User blog comment:AndImBatman/Activision Expects Sales to be Down for Next Call of Duty/@comment-4676581-20130208154751/@comment-1263839-20130209172657

I'm basing this off your post now. You say to avoid killstreaks slap on perks or the obvious stay inside. See this is where the problem lies, if you go inside, SMGs have an advantage and if you go outside you die from something you can barely avoid.

And you call making explosives OP "balanced"? Explosives are usually a major contributing factor to why a game isn't balanced. Who needs weapons when you can abuse explosives and get many, many kills just because their radius is large combined with mad damage. And attempts to counter something which unbalances a game is bad, see the incredibly Overpowered Flak Jacket from Black Ops.

As for Quickscopers, they're usually a free kill if they're the kind which do "l33t 360 noscopes/quickscopes" or something like that. The normal ones with their abuse of the aim assist feature basically make your body a nice quivering piece of meat to destroy.