It would be great to be able to use Multi-select and search together. For example, searching Vault from the mobile app for documents within a folder with the file extension '.PDF', then multi-selecting the search set before moving the files or adding them to a new folder.
It would also be helpful to go the other way, for example start multi-select, then type search criteria into the search box, to Filter the files in the folder - before multi-selecting files to perform an action on.