Decouple favorites from offline availability?

Combining offline availability with the favorites feature looked like a pretty good idea to me at first. Now I have a folder with a few hundred MB of data. I would like to have this folder available offline on an iPad, but not on my iPhone. (Mostly because storage is more limited on the phone.) However, since the favorites flag is dutifully synced between my devices, the downloads also take place on both of them.

Provided you agree that having (arbitrary amounts of) files available offline is a desirable feature, I would like to propose decoupling the favorites feature from offline availability. Surely that means another button and file management code, but it would help immensely in my use case. What do you think?

I found a few other issues here where it was already suggested that favorites might not be intended for marking lots of files - still, one folder is just one folder, isn't it? :) (I think this issue is different from favoriting too many files.)

iOS version: 11.4.1
App version: 2.21.3.1
Nextcloud version: 13.0.5

No files, tests, or entry points are identified in the issue. Start by tracing how favorites sync and trigger offline downloads in the iOS app; done means offline availability can be controlled independently per device without changing synced favorites.