There are a lot of good suggestions here. It's interesting that when it comes to firearms, different strokes for different folks holds true to form. Many of the reasons articulated in the lengthy post above as reasons for disliking the M&P 2.0 series are the very same reasons I really like it.

The multiple suggestions above regarding the grip texture are good. I wear t-shirts all the time. Most of my concealed carry holsters are purchased with a sweat guard of some sort. You can sand the texture, use a slip on grip or even grip tape. Heck, use one size smaller palm swell and put the grip tape texture you want. I understand that there are many of use who do not wish to do such modifications to our pistols. I'm kind of that way. If you are too, the simple solution is to sell it. There are plenty of suitable and awesome alternatives to the M&P. Don't feel married to a particular model of pistol if it doesn't provide the satisfaction you desire.