@Dan356 I think @Helen3 's suggestion of looking for one of the local Facebook groups is probably a good one. I don't belong to any, so, unfortunately, I can't help there.
The new registration system, registering directly with the City and paying a $125 license fee, takes effect April 2021. The new rules mainly target "party houses". One-night stays are prohibited, effective since October 17th. I don't believe any other new items impact the process for appealing denials.