Manuscript data fields
I've noticed "manuscript" lacks some of the standard data fields. First, the "editor" creator type: I'd argue this should be added, since there are many editorial interventions into manuscripts and manuscript collections, including pulling them apart, rearranging them, etc. For the same reason, I think you need to put the "number of volumes" field back in. It would make it much easier to accurately enter a collection when you don't have time to go document by document.