there are a few things I'd like to see streamlined in 3.5 and what we've since of the Saga rules seem to be partly in the right direction.

Skills: I like the idea of dumping ranks and just making a skill a proficent or not kind of thing. The unearthed arcana had some okay ideas about solving the multiclass problem.

Multi-Attacks: I thing more powerful single attacks are much better than dozens of dice rolls that have little chance of impacting on the game. One of the reasons I ended my last campaign when we got to level 14 was I was so tried of waiting for the Ranger to resolve all his attack rolls. He was making six or more attacks in a round. Most had little or no chance of hitting and doing very little damage individually...overal he still did as well has the heavy hitter but it usually took the player three times as long to resolve one round. I would really welcome getting rid of multi-attacks and having two weapon fighting resolved by either added extra damage to a single roll (one roll resolving both weapons with a penalty on the roll and the damage added together) or a single roll against multiple adjacent targets.

Things that would really make me happy would be an extreme reworking of character creation to make far simpler characters. Overal I like combat as it is...Tactical and boardgame-like with a lot of rules covering all those oddball things players like to do...ie wanna arm wrestler a marilith...okay...we can do it.

Things that would sell me on updating...

Cutting back on skills...I could envision a list about this long...persuasion, preception, education, survival, athletics, thieving skills (unique to thieves), stealth, craft, spellcraft (unique to spellcasters), and that is it.

Sometimes I really miss the good old days when nobody needed any skill. Players told the DM what they wanted to do and the DM told them if they could. Knowledge was what the DM deemed they were likely to know or what the player had lurking around in his head...after thumbing through the module while the DM was on the John.

Getting rid of extra attacks per round...or at least reducing them as much as possible. Everybody is waiting.

One page character sheets. I find I'm playing more and more often with people coming back to the game after a long break, new and unsure of gaming people or people who've been playing other systems for years. As much as I love D&D (and play d20 almost exclusively) the character sheets and the growing complexity can intimidate people out of the game...I remember MERPG...played once when I was first starting out and to this day have never seen a game I liked less. If that was my first RPG experience...I would have done a lot better in school.

As a flavor note...get rid of all this players making and buying magic...it won't happen and I guess it works and is balanced but come on...lets find our magic items...not buy them at "magic items'R'us". I was recently playing Talislanta and the gamemaster asked me what sort of items would I like to buy...I told him the truth "nothing I'd rather earn them than buy them...whatever they turn out to be".