You do want to lose the cup as you are accelerating into the follow thru.
That is supposed to occur right at the bottom of the swing.
If however, you begin to accelerate a little before the bottom, and uncup on the way down, you get a nasty sounding thump thump.
As for a thought process… I'd experiment with attempting to throw both a loft, and good revs.
Throwing revs helps get the wrist cupped, while trying to loft helps stop the early uncupping.
Once you can achieve both, change the loft thought, into a "project the ball towards the target" thought.
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