Don't you have to install every PS3 game (even if it's not in full)? That didn't really hurt them, so I don't think it will hurt MS. Besides, it says you can play while installing. I don't see this as a problem.
Blocking used games doesn't affect me, but it definitely affects a large amount of people and I think it sucks. Same with the always online. If you really have to be connected on XBL just to play a SP game, it's going to suck.
Hopefully the rumors aren't true, or at least MS is able and willing to make some changes. I guess we'll find out soon enough. Is the announcement stilll rumored for April?