My suggestion is to have an option to Export/Import the Collections from Osu! to the User Profile page and them from the User Profile to Osu!
FAQ:
Why this would be usefull?
I guess everyone has beatmaps to save in separate categories, like "Beatmaps to farm, Beatmaps to Pass, Beatmaps to Practice" and them they are added to the Collections... but just imagine that you have to use other Desktop or your Osu!Client crash and everything is reseted/deleted from collections... it would be like an backup.
Why just don't favorite the beatmaps?
Well... Favoriting every beatmap takes a very long time... And it's harder to find because favorite lists don't have a way to filter/organize them in categories... it would works if they link favorite and collection as one... but not in this case...
FAQ:
Why this would be usefull?
I guess everyone has beatmaps to save in separate categories, like "Beatmaps to farm, Beatmaps to Pass, Beatmaps to Practice" and them they are added to the Collections... but just imagine that you have to use other Desktop or your Osu!Client crash and everything is reseted/deleted from collections... it would be like an backup.
Why just don't favorite the beatmaps?
Well... Favoriting every beatmap takes a very long time... And it's harder to find because favorite lists don't have a way to filter/organize them in categories... it would works if they link favorite and collection as one... but not in this case...