WoW style HP and Mana Regen. (In combat vs. Out of combat)
Instanced dungeons.
Remove Anon/RP
Fewer shared spells (ie: Paladins, Clerics, Druids, Rangers, and Shaman share the same pool of heal spells.)
You know, the kinds of things that you don't get right the first time around. The concept was pretty much D&D meets LotR, but the implementation lacked the type of balancing you only get from years of empirical study.
That being said, I want to note that "Classic" EQ should be exactly what it is now
[You must be logged in to view images. Log in or Register.] A game I play to reminisce about the "Good Ol' Days" when I walked to school in 2 feet of snow up hill both ways!