Let's say that Fallout 4 had co-op gameplay and that it is written in stone and won't be taken out or expanded upon to be MMO larger multiplayer-esque.
What would you want to see in this co-op feature?
What don't you want to see in this co-op feature?
And finally, do you think it is feasible that Fallout 4 is going to have co-op considering the amount of requests from Bethesda fans?
Personally, I don't care for co-op so I would want it to intrude as little as possible, if not at all, on my singleplayer experience.
So I would hate it if the game used a save slot system that autosaves after bigger decisions which I've seen is a staple of co-op console games.