The device panel shows how many files have to be synced to or from other devices but it does not indicate how many actions have to be synchronised. (Eg renames, folder changes etc)
WOudl it be possible to also indicate the pending actions that need to replicate, maybe next or in addition to the pending files? That way its better to be aware which vaults or devices/drives are really in sync and which still need to have some actions replicated.
Especially when you are re-organizing an existing library it would be handy to be aware of that.