Very interesting tool - I think it is exactly what I need for renaming fmily photos. I just need to spend time with it to learn its full power.
One suggestion: add configurable buttons that insert user-specified words/names when clicked.
For example: I have 2 kids, a wife, and a dog - so I often want to tag my files with their names. We have lived at 2 addresses - so I often include those as a location. If you gave me a row of buttons along the bottom (or a couple/few rows), let me configure what text they have (Amy, Bob, Charlie, Dan); (1 Main St, 2 Whatnot St.), and specify where the text goes (ie what step to insert them) - and even provide shortcut keys for at least some of them, it would be amazingly quick to tag subgroups of photos.
IOW, the overall naming pattern would remain constant (ie date in YYYMMDD-Seq#, etc.), but I could select 10 files, click a few buttons according to who/where is in the group of pictures, and rename them. Then on to the next subgroup.
Good stuff!