In an uptempo system like Charlotte he would wind up using 15 seconds of the shot clock on isolations and then shooting a step-back twenty footer. If your goal is to find a big forward who's going to primarily serve to space the floor, and you're going to be paying him max money, you can do way better than a career 34% guy. In reality, the Bobcats shouldn't be tailoring their personnel around the MKG post-up. You need to let the guy be who he is, and that's the next in the line of the Kirilenko/Deng/Iguodala/Gerald Wallace utility guys who play at a very high level. Get a 20+ ppg scorer at the two-guard, find a power forward/center who can score inside, let Kemba be your #3, and MKG will take care of whatever it is that needs taking care of that night.
It also bears mentioning that Rudy Gay's going to be 27 next year, and while that's not old, the rest of Charlotte's roster is two to three years away. You don't want MKG, Biyombo(if he's still around), and whoever Cho drafts this year and next rounding into playoff form right as Gay's athleticism is eroding.