If you cast, hold the lag.
If you arm lift, low and slow.
If you over rotate, restrict hip turn.
If you come over the top, swing to right field.
If you get quick, slow down the backswing and pause at the top.
…and on and on.
These are well known fixes for these ailments and as I have said, the opposite of bad is not good. The opposite of a communist is a fascist.
These cliche fixes are the equivalent of telling someone who aims too far left, too feel like they aim too far right. Guess where that ends? Correct, aimed too far right.
Shouldn’t the fix be to learn to aim correctly?
Shouldn’t the fix be to eliminate why the cast happens, or turning the hips freely at the proper angle so they don’t over rotate?