any thoughts?
If the spin on the flip change is similar to the spin axis of another pitch it would be desirable to have a similar spin rate. We always want the CU to look like something else. I have found some pitchers with considerable spin on their flip change and by converting them to a back door flip ended up with a really sweet change up that when thrown by a RHP would break down and away from a RHB. Sounds like you are already getting some movement so why not enhance it.
Words your will never hear me say to a pitcher - "You are spinning the ball way too fast."