Bear in mind that is talking about the Beta version, some stuff changed between Beta and Final.
Psionic bears, brr....
What did happen?
- Bard song got nerf'd - I think they got a few more goodies
- Wizard specialization was changed, and the abilities got bound to wizard level, not caster level
- Paladin became awesome
- Monk's flurry got better
- Barbarian got worse, but simpler to play. many abilities became available 1/rage, instead of shortening the duration.
- Sorcerer, Fighter, Rogue and Ranger stayed the same, pretty much.
- Cleric domains were changed back, for the most part - they were incompatible with splat domains, and keeping compatibility/portability WAS one of the concerns, after all...