Yes, pincers work nicely in close combat when placed together, I guess they deal more damage for that exact reason - you have to go into close combat to use them, alternatively to most other weapons. So it's damage is quite reasonable. First rule of pincers club - never say they are op *cough-cough*
Ooh, gotcha. They'll need balancing eventually anyway *cough* Yea, claws do have their downsides that balance it out; mainly being the fact that they're strictly close-range, which means any creature that's able to out-maneuver and out-range you will be more than just a "little annoyance".