AllisterH said:
Spellthief is what I've seen.
The class isn't powerful. Far from it, it actually is pretty weak but it had great flavour (a guy who pilfers ACTUAL spells and not just the spellbooks? That's a somewhat unique idea...)
Problem was the mechanics behind it left a LOT to be desired. It seemed way more trouble than the paltry gains.
Good flavour, Bad Execution.
You know, Spellthief happens to be my favourite class. And I fully agree with you.
The big problem with the class isn't entirely mechanical (although they're definately a part - in short, to steal a spell you have to waste an action to acquire it, and then another action to actually cast it - and you can only steal spells that a wizard of equal level could cast. So, um, why not play a wizard?).
No, the big problem with the class is one that the ranger suffers from - the GM picks when your class abilities come into effect. My spellthief started off as a load of fun (let me tell you, there's nothing quite like stealing a random spell from your enemy, and then having to figure out a creative use for that
Tenser's Floating Disc you just stole; stealing energy resistance from a creature and then blasting him with a spell that did that type of damage was also a lotta fun)... but then, as if the GM wanted to 'counter' my abilities (yeah, he was pretty, uh, "Clever"), I found that every encounter was against fighters, ogres, giants, and beasts.
Spellthief is pretty much a waste, then.
In a game where you can expect to be stealing spells quite often, it might be balanced. But I think you could make it more balanced by making spellcasting a 6 level progression, and giving the class 8 skill points per level. Do that, and it's more or less balanced with the rogue or beguiler. (is it just me, or does anyone else think it's weird that the class offers no special synergy with the use magic device skill?)
***
Really, though, I haven't seen anything in our games from wotc that truly unbalances things. This may be because I have plaeyrs that are self-regulating; if they came across something that would be terribly unbalanced, they would talk to me about it first before even thinking about using it. But, really, about the only thing I've seen that I'm not a huge fan of is a spell from Complete Champion that allows a priest to cast a spell that denies a target from dying from HP damage - and he can cast the spell as an immediate action.
However, that spell has prevented PCs from dying, so maybe it's actually kind of a good thing.