i imagine part of it is that you just don't get to spend enough time with the game to really notice everything. every year when i buy nba 2k, sometimes there are pretty big flaws that i don't notice until a month or two after launch. it takes a lot of hours with a game to really pick up on everything...plus, like you said, i'm sure there are actual changes between unfinished version you play and the final release. heck, the game changes fairly noticeably throughout the year just from updates and patches.