Feels a little different than the demo (expected, I guess). I played like 3-4 matches so far, so no real big impressions so far. I'll try to play some Career Mode in an hour or so and post some impressions about that.
1) I don't know, looks like all the awesome lighting in the demo is gone. Also new animations, like when you sub a player in the demo, are gone (from what I have seen so far). Graphics look more like FIFA 11, than FIFA 12 Demo. Demo looks more sharp also.
2) I'll try to play at Old Trafford after Honduras U23 - Costa Rica U23 match ends
And Yes, Ibra samurai is in the retail game. Btw, a lot of people in the online-mode are playing a "Early version of FIFA 12" wtf?