Regarding MOABs, I much prefer them. I had no interest in the Nuclear medal, the MOAB/KEM works well because it's not that much of a game changer. The KEM works even better in Ghosts as there's no tac inserts so there's no KEM boosting. I just wish you didn't get one in that stupid CP on Strikezone. I know why they did but it's annoying.
Sniping should be more like Battlefield in terms of headshots should get you kills. No more dying by being shot in the leg with a silenced sniper, or being spammed by an automatic sniper. I'd remove silencers and thermals scopes, and make it so you can only get a kill with a head, neck or upper chest kill.