We switched from iCloud to Dropbox for Notebook export/import due to the same reasons why we couldn’t implement iCloud seamless sync. iCLoud API was limited to meet our complex data model so was not able to allow a seamless sync of data. And Apple did not want to approve iCloud with manual export and import of data in the mac version even thought they approved it in IOS. drove us crazy.
So we had two choices to get it approved. Just remove iCloud altogether and not allow any data push, which was not logical, OR find an alternative for data push like you have and liked on the iPad. Dropbox was the alternative.
We spent billion cycles on automatic data sync both on icloud and dropbox. it just has lot of version conflict and lot of risks of data loss. The best solution later will be to build our own API.
