Celebrim
Legend
But this is a highly derailed topic. I would rather talk about the full-casters and their hyperbolic power curve and ways of getting their power curve to straighten out a bit.
One thing that I think may be effective is reducing the DC of saves vs. spells by no longer increasing the DC of a saving throw vs. spells according to the spells level.
So, a 0th level spell and a 9th level spell would have the same DC saving throw. This makes generating outrageously high spell DC's much harder, and restores some of the balance found in 1st edition that as character level increased the general chance of saving throw failure decreased until, at higher levels, the high level spell caster throwing spells at another high level target would expect those spells to succeed only if the victim rolled a 1 (or maybe a 2 or 3) for it's saving throw.
(Similiarly, I don't think it is necessary to boost the DC of resisting a monster's extraordinary or supernatural abilities by 1/2 it's HD. In general, I think saving throws are harder than they need to be. Most creatures with large HD also have big ability bonuses, with a result that PC's can only succeed on their good saves at best, and have virtually no chance of resisting on their poor saves. Most commentators have focused on the fort/save/will bonus as the problem, but I've become inclined to think that the real problem is with the DC's.)
Another thing that I think is important is restoring some of the balance that was lost between 1st edition and 2nd edition. Much effort was made to nerf things that were brokenly good in 1st edition (fireball, for example) but alot of things like rope trick and polymorph other/self were significantly improved in thier 3rd edition incarnations with I think painful results on the overall game balance.
Thirdly, I think that spells are too hard to disrupt. I would like to see spells have an initiative delay between when they are announced and when they go off so that they had a decent chance of being disrupted occassionally (by whatever means) without a readied action.