Agreed. When I'm getting one shot across the map from a slug shotgun, I'm not sure I understand the point of using anything else. Looking forward to unlocking it.
I like the maps for the most part. I do agree that it would be nice to have some larger maps like those we had in Black Ops 1. I'd also love to see more varied seasonal effects - I loved the snow maps in previous COD games. I don't think we have ANY snow maps in BO2, which just feels weird. Always loved the muffled footsteps.
Would also be fun to have a few other environmental hazards, like a volcano/lava pools, or some such stuff to deal with. Nothing extensiv...
The problem is... there will not be, at least in the foreseeable future, a sufficient groundswell to actually punish game publishers from going this route. You're not going to get a large group of folks that will bond together and say, hey, we're not going to buy Call of Duty Black Ops 3 (or whatever the title may be) because it requires you to keep purchasing DLC to compete or to participate in multiplayer.
As with many things, it will probably eventually require ...