They’ve had 2 Betas and 2 Release Candidates to examine the novelties in 7.10, what are they waiting for?
Anyway hundreds of things changed and only people with the add-on can track down the incompatibilities. There’s no way we can guess what each add-on will have problems with, the only way to know is testing.
By the way, there isn’t anything in 7.10 that is a big compatibility breaker, this is probably just a minor issue that needs adjustment.