for me at first it seemed impossible to not rotate my wrist early. but i found that for me in my pushaway I think "lock my wrist in the position i want to finish" and that helps me to not turn early. hook/power does not come from your wrist or hand... it comes from the shoulder which means : you must be balanced at the line, facing your target, in order to transfer the momentum/power from shoulder to elbow to wrist then fingers, which is best accomplished with an effortless free swing.

(I get more revs and ball reaction by trying to NOT put revs or do anything like cupping or turning my wrist!)

baby steps. it sure wont come over night but just remind yourself that it is worth it.

If you're going to make any change to your game, you need to be committed to the change.  It's easy to recommend one hundred and one things to players, but if you're not committed, you will just be frustrated and be annoyed at all those who recommended a change.  
I think it is worth the change, if you can commit.  It's also worth seeing yourself on video to understand and visualize what is wrong.  Sometimes it sets a light bulb off.
I always say, it takes only a 1/4 turn of the wrist to create all the leverage needed.  Sometimes envisioning getting your fingers straight out from underneath the ball, without turning your wrist, it might surprise you.  Imagine smacking yourself in the face with your flat palm as you come up on the ball.  A little mental over-correction might have you corrected.

If you get it right, don't be surprised if you need to re-evaluate your equipment and definitely your targeting.
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throw backup ball.
then throw straight ball with proper follow thru.

then problem solved. at least thats how i solved my chicken wing