The sync to folder feature was really designed for bands that need to all synchronize their devices together and want to use the cloud to do that versus the device to device option. The paths on every device may be different especially if SD cards are involved. The feature currently works best if MobileSheetsPro is managing the files and folders as you are aware. I can certainly write up an enhancement request for the future to try to support what you are describing, but I think there are going to be some semi-complex issues to solve in cases where devices are synchronizing to the cloud folder, they select the 'restore to original location' option but they can't recreate those folders on their device, so then I have to figure out if I should be trying to use as much of the original path as possible (which only works well if all of the original paths are relative to the storage location) or just fall back to the current implementation. This all has to play nicely with the folder mappings option as well which I'm assuming I would have to start ignoring if the restore to original location option was enabled and it is possible to recreate the foldler paths. You'd also have to reupload your library again as I don't see any way around that in order to add the original locations for the files.
Mike
Mike