Very interesting set of answers.
We have gone from no bevel needed if pitches are perfect in conjunction with the wrist supporting, to well maybe a little, but in conjunction with other elements mentioned. I agree bevel will reduce with a more perfect fit. I note some hands seem to require more bevel in the thumb based on the amount of skin between the thumb and the hand. Those with almost no fleshy area there seeming to require the more or most minimal amounts of bevel.
SO, the Mo Pinel bevel tips I mentioned are designed to help bowlers get out from the various setups they have exactly...Now with today's setup.! Impending somewhat refers to this. A sharp almost no bevel thumbhole gives him nerve damage. This is not unusual for many people who like to vary forward from the pitch tables. By applying the Mo Pinel ring finger test and noting the probable drag on the flat portion of the thumb he most likely will probably start to slowly relieve the painful sharp pressure point on the flat of his thumb by gently adding a "sufficient" amount of bevel.
Of course a master such as Just Rico could change all this by varying spans and "angles in the ball" Most probably leaving you/Impending
with the perfect no bevel setup and a proper dynamic fit.
Again, I reiterate I just add gentle amounts of bevel to balance removal of hanging in the ball with holding power(less bevel). Of course pitches obviously play strongly into this scenario.
Regards,
Luckylefty