UPDATE:

Mixed in about 10 units of up with my rudder and it seems to have done the trick. I leave the mix on all the time. Now, when I make yaw corrections on an upline (so long as the corrections aren't major), the plane won't pitch to the belly. There is some rudder to roll coupling that requires opposite aileron when I do a knife-edge.

All in all, plane is flying well and my sequences are getting better.