You really need to be able to control your body…all about telling your body what to do instead of having it do what it wants. That is what balance is…its not being able to control your weight just at the top…its keeping your centerline and core balanced the entirety of your delivery. So you just watch for bad uses of energy in your delivery…keep your front side under control…maybe look at different ways you hold your glove in that arm that can keep your more balanced and direct.
As far as the 2 seamer…its always a pull…in our minds we like to think that we push that two seamer to get action, that we push it to get movement. Just turn the ball and throw with the seams into your natural pronation. Big misconception in finger pressure and all that BS. Finger pressure isn’t something you can manipulate consciously…it is done by the way you grip the baseball and finish pulling through it.