Good stuff

I am going to ramble a bit, I apologize in advance!
Hardhead said:
Very few spells give no save. As for buffing spells, I would argue that they aren't relevant to the power balance. They are not spells that end up being useful in combat, and so aren't relevant when you're talking about power levels in combat.
I'm afraid you have lost me on this statement

Not really sure where you are coming from.. the very definition of 'buff spell' is something that makes you better at something else, almost always combat in d&d. Whether it increases a stat, makes you harder to hit, makes it easier for you to hit others, makes you bigger, tougher, faster, whatever.. they are all combat applicable. Plus they all take up spell slots.
As for few spells having no save I think it all depends on what you are going for. You could pretty easily have a character who was nothing but a buffer/healer/noncombatant. No relavent saves in that category, and at least in 3.0 it was a viable build. There are a lot of touch attack spells that do not grant a save as well, especially in 3.5. (I am mixing and matching I know, bad me, unfortunately I am out of town for the holidays and my books are not here. I will try to check the srd later and view a few schools for save/no save spells) From what I remember about the other comparison thread they said that it averaged out to less than half the total spells had no relavent save, I dont remember how much less than half though. Plus the boards seem to have eaten the whole thread.
Hardhead said:
Weapon Focus doesn't apply on coup de graces, for instance, for the same reason SF doesn't apply to buffs. They're actions generally used outside of combat that don't require an attack roll/a save. But that doesn't make weapon focus any less powerful in combat.
And a fighter will end up having to grapple or make an opposed trip check or use a weapon he's not focused in eventually, as well.
I like weapon focus, it is just fine as is. It is used incredibly often. Of course it doesnt apply to everything, unless of course you can use that weapon for everything. However, you are still able to use your weapon, if you decide to coup de grace instead then it isnt like the foe was a challenge anyway since they were helpless. If the caster had to use a spell in that situation (not to get the foe helpless, but to kill an already helpless foe) then the caster is already in a huge amount of trouble. Essentially wasting one of their precious spells per day.
Hardhead said:
OTOH, once you're high enough level, the first two are usually gimmes. The WF is wasted on those. Realistically, WF only makes a difference on about half of a 15+ level fighter's attacks.
If the +1 isnt making a statistical difference at these levels (and by this I assume that you mean the first 2 attacks at least only fail on a 1) then that high of a level character can essentially trade in that +1 for an extra point or two of damage, or an extra point of ac, or can keep it and hit 5% more often with his other x amount of attacks. If he gets 4 attacks in a round, only two of which gain any benefit out of the +1 then the fighter still has TWO attacks that are getting a 5% boost in that round. The spellcaster, if his spell focus is applicable, gets only ONE 5% boost. Net advantage? Fighter, by a landslide.
Hardhead said:
It depends on your assumptions about the wizard, really. If he's casting from a lot of different school, then yeah. But if he's casting from just one, a 10% increase in keeping them from saving was huge.
From different schools? Nah, my assumption was already that the vast majority of his spells were coming from the same school. Looking over most casters spell lists, even for specialists, I would rarely expect to see even 80% from just that one school, except at lower levels or an incredibly diverse school. Even so, if somehow 100% of your spells are from the same school, and they all require a save, then the fighter will probably still be swinging at least 3x as much. Probably even up to 10x as much if your caster runs out of spells and has to use a crossbow, or even running against creatures resistant/immune to whatever they are trying to do. The resistance is not hard to get to, or even dm fudging, just the way monsters are created.
Evocation is an easy one, a good portion of its spells grant saves, and they are all reflex saves if I recall correctly. These mostly have some energy descriptor or another. Most are save for half or none. If you take this feat then your spells from evocation are 1 dc higher, good stuff. However, anything with a good reflex save, decent energy resistance, evasion, etc will be able to avoid a good portion of your spells to some degree.
All the while the fighter type character will be swinging away several swings for each of your spells, gaining a +1 to each swing while you may only get a +1 once per round. The accumulation of use is just incredible.
If a feat gives me the same bonus, but I am able to take advantage of it say twice as often without even trying very hard then which feat is better? Kneecapping yourself into one school with one save (if the spells even give a save at all) is just not good.
Hardhead said:
But without seeing them, I'll agree with their results given the assumption is a wizard that casts from a lot of different schools.
For a heavily specialized wizard, who casts 90% of his combat spells from one school, SF is still good. Is it a great feat? No. But it's a good one.
It is a feat, but good? doubtful. It has its uses, albiet very minor, but in the end they are fairly not effective. Your enchanter type example is an interesting one. Lots of will saves, with save for no effect. So your uses are all or nothing, everything and anything that can give an edge is desperately needed. Being desperate does not a good feat make. Look at toughness, a first level wizard with a con penalty is desperate for hp and has at least a decent chance of taking toughness. I think we will both agree that toughness is a subpar, bottom of the barrel type of feat. This anology seems pretty close to me, it may not to you, it is late and I am trying to make sense.
Even at +2 I felt it was a useful feat, but fairly suboptimal in a lot of ways. Basically it exactly countered the +2 to a save feats, but it didnt do quite as well because you tied yourself to one school as well. So basically 2 drawbacks (costs a feat and only applies to one school which generally only has one save) for one benefit (bonus to dcs of that school) vs 1 penalty (costs a feat) and one benefit (gives a bonus to roughly 1/3 of the saves)
If you have 20 spells in a day, and all 20 are spells of that school with saves then you have no buff spells, you have no contingency plans in case your foes are immune to that save, you are essentially dead in the water at least 1/3 of the time if the dm is being fairly creative in his uses. Plus your fellow players may be a bit upset that you dont do anything except in combat, hard to say on that one though.
The fightertype is constrained to one weapon, but then they nearly always are anyway, it is hard to afford multiple good magic weapons after all.
You cast your 20 spells and get 20 different 5% increases. Some of these wont matter anyway (they only fail on a one, only succeed one a 20), others may be immune (undead or constructs vs your will saves), and then the rest you actually get the bonus on.
Whereas that fighter type generally gets to swing as many times as they can/want in a day. This could be hundreds, but lets just go for 40. 2 swings average for each round the caster was casting. He gets his +1 for each of them though he has similar problems as above. Not mattering (can only hit with a 20 and only miss on a one, although with the only hit on a 20 you could turn the extra point into damage, ac, or something else), immune (this generally does not happen, at the levels where it might happen SR applies to the caster so is mostly a wash), and the rest you get the full bonus on. So in this example way more than double the benefit.. double from the use, but a few extras from being able to turn that point into other uses when needed.
I am just repeating now though ;/ I will try again tomorrow to find that thread.. but it does seem that the boards ate it up. Very unfortunate.
Have a good one though

Hope that this helps make some sense from my point of view.