I'd also just trust the instructor. It's their judgment call. No one on the internet is in a better position than them.
I completely disagree with this statement.
Just trusting instructors is the reason why my fundies course is helping me break a lot of bad habits.
Check out Jim Lapenta's book here: https://www.amazon.com/SCUBA-Practi...?s=digital-text&ie=UTF8&qid=1493592952&sr=1-2 to help you find a good AOW instructor.