Scrivener for iOS needs a better Sync model than DropBox

My school offers them all (Box, Office 365, Google Drive) except Dropbox. OneDrive tends to be flawless, Box is a pain because of Box Sync (used to be unreliable, it is fairly reliable now, but still has missing features, like automatic login item) and because they refuse to make it compatible with beta MacOS, Google Drive would be perfect because it offers virtually unlimited space (5TB anyone?) but it’s strongly discouraged by L&L for use with .scriv projects

Anyway, Dropbox works well, as good as OneDrive for sure, so, while I would like to have more options, I don’t see a problem with the current Sync model