Is there a way I can take the weight off my thumb and put it more on my fingers without changing the pitches in my thumb? Just want to come off my thumb more clean.. I hear the more you cup the ball the more the weight shifts to your fingers.. Thanks for your help...

Try it, don't ask us, just do it and see for yourself. What if it works for you and someone here says it wont and you never try it until years from now. Bowling is all about experimentation with different swing paths, timing, releases ball speeds, lane angles, equipment, don't be afraid to try anything, the worst that can happen is it doesn't work, but you might see what it might be good for.

I agree with CoachJim, at the least you will learn something that might not work all the time but it might be a quick fix for something else on a night where you are struggling to throw the ball decent. Who knows, it could become a permanent part of the game.