Yeah, as everyone else has said: CM3 is doing fine. Teams are definitely gameplanning for him, just like they did for most of last year, too. They often roll out away from him, run away from him, or put two lineman, a lineman and a TE, or even 3 blockers on him. And despite all of that, he's STILL making plays! I would like to say pressure from more people than just him, though.
The one thing I will say about him, though, is that he needs to break down when he gets to the backfield. The dude seems to fall/slide around more than anyone else in the league when he gets to the backfield. If he could just slow down a tad when he gets back there, break down, and put a hand on the ballcarrier rather than sliding by him, he could probably double his huge plays!