2.3 has an aggravating new feature, it requires a much longer wait for authorization of the server and punkbuster. the new maps are cool though, however they do require a lot more FPS than most of the others.
2.3 is pretty cool - there are still quite a few bugs in the game (upon joining the game when you are forced to select a weapon - you cannot get off this screen until the current round finishes even once you have selected your weapon, so you cannot spectate on any other person playing the game. You also have to wait for the round to finish before you can actually leave the game (which is very annoying).
I think the PB authorisation is pretty good because it shows us that PB is actually trying to stop hackers.