As I understand it, a CF shaft is stiffer than a comparable diameter wood shaft and would/should therefore flex less when using R or L spin and therefore push the CB off line more, creating more deflection or squirt.
I am not knowing the answer to your question. However you bring up something I’ve wondered about myself:
Deflection isn’t just squirt. It is the sum total of squirt and swerve.
I have a hard time judging swerve.
I have a better feel for squirt.
For example, O.B. 1/2 ball off long rail with C.B. a little steeper than a half ball hit. If I want to bring C.B. across table to opposite long rail I might aim a little thicker
than if I want to double the rail across.
I don’t think that I’m accounting for swerve just the initial squirt. If I get the feel for those shots with my cue, why would I want to change to something else that might be negligibly different.
Good wood is gonna keep getting harder and harder to find.