Grip changes are risky. They fix your current element but can have affects were you don't expect them...balls going too high/low, tendency to overcompensate and do the other way (as you see now).

If others see you not releaseing your hands, they are just trying to help you as best they can, because I have never actually "seen" anyone actually release their hands..your are swining much too fast. What I do see is the your position of your body at impact, and the result of the ball flight. From those I know what you did.

So if you are not transferring your weight, you are in trouble. The hands and arms will have to compensate and will be prone to fail frequently. The body turning (correctly) prior to impact is your solution:

Do my impact position drill.