Wow, that's one of the most biased polls I've seen on here in awhile. And considering some of those polls, that's saying something.
I can't pick any of those choices, since they either don't represent my view, or are blatantly insulting. My thought is..... there's no real need. Yeah, we can keep playing after the end of the MQ. But there's plenty to explore and find already - lots of sidequests, dungeons to search, hills to see beyond, etc. Programming what sounds effectively like a whole new game - "the world alters and new quest lines, items magics dungeons etc to explore".... seems a bit odd. And a lot of work for an "after the game" thing.
....you know, thinking about it more, yeah - you can "finish the main quest". But with the free-explore/open world thing they have going on in TES games, it's not really "end game", is it?