All I want is REAL WEAPON BALANCE.
Black Ops 1 did it really fine, except that the FAMAS and the AK-74u were somehow above the rest, and were of course overused. Everything else was quite good.
Keep the akimbos like Black Ops, with a really huge spread.
No semi-auto sniper should 1-shot kill. Only bolt action ones.
Make quickscoping hard, by not giving bullets pinpoint precision until the player has fully scoped.
No deathstreaks, and no lethal pointstreaks for using the Support Strike Package.