I liked the bo2 maps. I think most people that complained wanted slightly bigger maps not the biggest ones they could create. 6v6 makes these maps way too big. It makes campers more painful than ever because now there's only 4 or 5 players on that team active in the match, or less in some lobbies.
If you are a camper your probably like ghosts. If you're aggressive you probably like bo2.
The spawns in ghosts are every bit as bad as mw3. They don't seem to be doing much about it either.