Me and my group tried out 4e back when it was released and had a fair few problems, and I'm curious as to whether or not they've been fixed yet.
1) The Cosmology kinda sucks (aka has anyone written a 4e Planescape supplement ala Planeswalker yet)?
2) The classes with arbitary restrictions, coupled with the poor multiclassing system, meant that fewer concepts were playable in 4e compared to 3.5e. It was not possible to have, say, a rogue who used two cutlasses competantly, or a greataxe, or what have you, nor was it possible to make a true Gish. Did they add any feats to allow you to use whatever implements you wish and such to remedy this yet?
3) Does it have stuff for some of the older settings such as Dragonlance or Planescape or what have you yet?
4) Another issue I had was that the Wizard especially was not very representative of a proper wizard, because it lacked proper representation of some of the major schools of magic (such as Illusions or Necromancy). Have these been added in, and if so, can you customise Illusions as you wish (so as to say, trick a foe with a fake wall or what have you)? In addition, I am especially curious as to whether or not summoners are in it yet, as my current character is one (Cloistered Cleric of Boccob/Malconvoker), and it's pretty fun.
5) Alot of the classes, especially the Psionic ones, were missing. Did they add these yet?
6) Another issue was the focus on goody-goody characters to a, quite frankly, rediculous extent. Did they add proper information on evil deities, prestige paths, feats and what have you?
Cheers in Advance, comrades.