Eh. I wouldn't. The FM3 has been out for over a year and a half, as has the improved pitch algorithm on the Axe III; I think if it were possible to port it to the FM3, they would have done it long ago. It's most likely not going to happen. Of course, I'm only typing this with the hope that they'll prove me wrong just to spite me, which would be amazing, but I have to keep my expectations in check these days. I just don't think it's possible.
As it sits, the current VC is quite capable and in a full band setting if you're playing dirty rhythm guitar, you'll probably be just fine sticking with the onboard pitch shifting.