Grog said:Put me in the camp that says "If everyone wants something, it's overpowered" is a ridiculous argument. Pretty much all high-level characters are going to want some way to fly. Is flight overpowered? Pretty much every party is going to want some way to neutrailze poisons/cure diseases/remove curses - are all those things overpowered? Pretty much every spellcaster is going to take either Dispel Magic or Greater Dispelling - are those spells overpowered?
See what I mean? If everyone wants something, it doesn't necessarily mean it's too good - it might just mean that it's very useful for common situations.
There are several alternatives to the Fly spell: spider climb, numerous items, and several other spells or abilitites. Therefore, the Fly spell isn't overpowered.
Dispell, on the other hand, is the only real way to deal with over-buffed spellcasters. Poly Self, Divine Power, Transformation, and Divine Rightousness turn any spellcaster into the ultimate melee machine: far better than a comparable fighter. The only good way to fight that is dispell or greater dispell. This means that buffs are very powerful and need to be limited. All the spells mentioned have a fairly short duration and can be delt with by running away for a few minutes.
Long term buffs don't have this option. You hit the nail when you said dispell. It is the only way, in combat, to stop a buff monster, but not every party has dispel. So, you either change the buffs or you change dispell. WotC oppted for the first choice.
The fundamental weakness of the primary casters is supposed to be their dependance on spells that can run out. All the fighters need is a recharge on hit points, and a 6th level spell is enough for that (at least in 3e). Day long spells mean that a caster could just polymorph, cats grace, GMW, GMW, and become a pretty good archer. The number of combats lose their power as a limiter. Those spells on fighters are just another example. The caster did most of his work at the start of the day and doesn't need to do much more.
Shorter buffs mean more thinking on their feet for casters, something that has long been lacking in the campaigns I have been in.