I didn't break it, but it definitely stood out to me in the environment. That's pretty amusing that the scripted event just plays out with a ghost vase, you'd think it wouldn't be too hard to account for the player smashing it with a different scripted dialog.
The only thing I've noticed as far as the game "breaking" and pulling me out of the fiction is when your companions run around right in front of enemies and outright bumping into them without being detected. Of course I'd rather that happen than them blowing my cover, but in a game that is all about this cinematic immersion it's really jarring to see. I think they could have at the very least hid that better by just having the AI park it's ass behind cover until you get far enough ahead and then just catching up. But instead they're antsy little devils that are popping up and running right up on you every few seconds, and all that does is shine a big old spotlight on the problem.
I haven't purchased a used game in years. I got nothing against it, I just prefer new games and they are pretty easy to find on the cheap if you're patient.
I'm going with the PS4 out of the gate though because I appreciate the pro-consumer attitude...more so than the actual thing Sony is doing with it's lack of restrictions on disc based games and online check-ins. Microsoft's policies wouldn't affect me, but they bother me. I think consumer rights are an important thing to stand up for and even when everything is digital I would rather have my eggs be in Sony and Steam's baskets.