I have been playing with the Maverick, just because it is something new, and while I like the gun, I do not think it is OP by any measure. CQC it plays like a slower Remington. It does say that, as a sniper, it is a OHK above the waist, and there will always be people who complain that "above the waist" is too much of a spread for a OHK. Personally, I prefer not to complain about any of the guns because they can all be countered. Eventually, if IW responds to all the complaints about one gun being more OP'd than another, versus forcing us as players to counter what we consider OP, there will be no need for different classes of guns, as they will all be equal. Maybe then we will start complaining one camo color gives too much of an advantage in certain situations.
When did the COD community start whining so much? If you think it is OP, use it. If you choose not to use it, then please do not complain when others do. There should be imbalances with weapons for heavens sake.