OS Specific Features Lacking
I can respect that you want to keep the CC base code clean of OS specific features, but I HATE subscriptions and I HATE the fact that you make the apps feel like 2nd class citizens on Mac. Two examples:
1) Full screen windows.
2) Full Dark Mode support.
I won't go into details as I am sure that any developer / engineer working on these products on a Mac knows exactly what I am speaking of. There was a time when I truly loved Adobe products and thought it was a fair company. Today with subscriptions and attitude, I'm looking for ways to leave them behind. I no longer recommend Adobe to anyone getting started in graphic arts. Adobe is EVIL.