I think you misunderstand, the original Subsistance came with it and it was pretty fun. Also a big part of what made Peace Walker fun WAS multiplayer and I personally don't see the point of Peace Waker if there is no multiplayer. It does kind of piss me off that it was removed because it was one of the main reasons I was gonna get it so i can play PW with my cousins.
Not sure about anyone else but once poisoned I can't stun my puruer even though I'm standing right next to him.Is that suppose to happen or is it a bug cuz if it's ment to be that way thats really stupid.