Well, most complaints here have been about Live overall. As a 90% online player vs. player guy, I will give my perspective. It sucks.
-The dunk from under the rim where the player wraps around and jams is unstoppable 98% of the time. Most of the higher rated players will use this ploy for the entire session without end.
-spinning or dribbling in place some how stops the double team and makes the defense spread out
-players can just bull their way to the rim no matter how strong or weak they are- i.e., steve nash can push Shaq from the free throw line to the rim and get off a layup.
-The 3 pt line is off
Overall there is just a large amount of balance issues that needs to be addressed as to curb the ability to exploit the bugs.