I want a harsh wasteland, not some carebear ponyland Capitial Wasteland world.
-This would be what I would be looking for too. Something were there are actually moral and ethical choises to be made. NV was ok , but really the DLC that nailed the desperation and the ugliness of the wastes was the Pitt.
I too would like to see the MWBoS and how they evolved. Legion... Not so much. Mostly because post Caesar I see legion lands fragmenting into smaller states.... something I see as a real danger for NCR too. Especially since NCR is stretched rather thin. I'd like to revisit the Shi as well but I think it would be rather hard to do story wise without having to rehash NCR again.
But really... as long as the world explores shades of gray... or at least realizes that there is a rainbow of colors between black and white, Ill be fine.