If a person who owns these files is on PTO or unexpectedly OOO, there is no way to do updates if needed. Please allow for this update.
All Premium Apps should be visible to a Smartsheet Admin, same as you can find the owner of all sheets in a sheet access report or user download. The new visibility in Dynamic View is helpful, but a report would be better.
Currently in Data Shuttle you cannot share the work flows, so that if you share Admin of a Workspace you have to setup the Data Shuttles individually.