please advise what other ways you think reapplicants do as an improvement besides taking flying courses or getting more explosed to flying.
It depends on what exactly went wrong in the selection, and then selecting an appropriate remedy. That is up to you to figure out. All I was suggesting is that if you want them to look at you again, you should have something to indicate that you warrant a re-interview. It will take extra effort and commitment on your part, but that is what they are looking for - how much you want it. This is my personal experience.