Call of Duty: Black Ops 2's design director, David Vonderhaar, defended the game's balancing and weapons in a recent interview with Destructoid, saying that the game's weapons are balanced with math and, as a result, lots of player feedback about overpowered weapons don't hold up.
In the interview, Vonderhaar said that there is an incredible amount of data logging in the game, which means the game's developers know a weapon's powerband and behavior at all times.
"A million people are going to Tweet me and tell me that the [for example] 'PDW 57 is overpowered, Vonderhaar what are you doing?' ... What I'll do is I can go and look at the math and I'll go 'Actually, you know what dude? You're just good with it. Have fun, because the math says that it's not overpowered," he said.
The full interview in which Vonderhaar goes into more detail about Treyarch's databases for managing information about how the game's weapons are used and how he deals with player feedback can be read here.