well the removed the external brick which makes me mad. I hope they don't remove the aa batteries cause I love those.
No external brick is great in my book. Two bulky Xbox bricks (one 360, one XBO) coming off my entertainment center sucks. I've never had a power supply fail as far as that goes so no concern there, and these consoles are cheap enough to be borderline disposable if one did malfunction (or warranty). Hell to emphasize the disposable part part of me is already kicking around buying this just to have the new model+2tB, and last gen I think I ended up upgrading through about 3 versions of 360 mostly voluntarily.
Removing AA batteries (not sure that's really an option) would be a disaster for me, as I just buy the bulk AA's cheap they have nowdays (50 for 12 bucks and such) and use them, no fussing with rechargeable baloney/wires/nonsense. My couch is out of range of recharging cords anyway.