I would like to suggest the ability to simply 'pick files' from the list in a folder rather than figuring out a filter to apply or moving some files into separate folder.
Use Case: I have a dozen random-ish files in a folder and I want to combine 4 of them. Rather than finding a filter which would allow only those 4 files to be shown, I want to be able to ctrl+click them to build the list manually. (as i click the name populates in the 'select by name or extension box?)