This one case I have to disagree with you on 2k because the we're on the forums. Mike Wang did a huge QA. Da Czar and leftos as well as davez were al communicating and taking feedback.
I'm a little more forgiving with sports titles because of such short windows of production but those patches should work. Playing a demo which is already stripped down won't give good enough feedback unless they releasea full demo and marketing usually doesn't.
Anyway I think I'm more conservative with my money. As much as I like AC I simply won't but a game if I perceive its not worth the headache to me.