IIRC it was better a few patches ago now most of the planes lose Aileron effectiveness as soon as the wings pass 90 degrees except for the Pfalz DIII, I can barely get a decent roll out of any of them.
So you are saying the roll response for all the aircraft in RoF (except the Pfalz DIII) has recently changed and is now fairly slow/unresponsive?
FM revisions were done most recently for the D.VII, the N.28, the N.11 and the SE5a. The change for the D.VII was really just to change the elevator movement to have a symmetric range of motion both up and down. This had the effect of greatly reducing the adverse yaw it use to suffer from.
I've been flying the St. Mihiel campaign, which involves flying the D.VII and the N.28 in the earlier missions. I did not notice any roll rate issues with either plane. They roll fine.
I don't know how to reconcile that with what you are reporting.