These are the things that are not yet fixed or tweaked so far:
1. Net animations
2. Referee's whistle sound
3. Player models
4. Ice skating movements
Based on the latest vids from IGN, I am really not impressed except for the new superstar mode but the rest still looks like NBA LIVE 2005..
NBA 2k6 of Visual Concepts is more impressive especially the revamped Association mode, new control system, new commentaries, the Crib, VIP system and new animations plus the much alive CROWD reactions...
But in fairness, LIVE06 is better than 2005.. Just an opinion and correct me if i'm wrong!