It's fine. I would just frame your interactions as "I'm on the waitlist and am obviously hoping I get in. However, if I wind up having to reapply, what advice would you give to help me improve my chances next time?"
It's fine. I would just frame your interactions as "I'm on the waitlist and am obviously hoping I get in. However, if I wind up having to reapply, what advice would you give to help me improve my chances next time?"