There used to be great renaming utility, now fairly defunct, that was called "Name It Your Own Way!" e.g.https://download.cnet.com/Name-It-Your-Way-NIYoW/3000-2248_4-10310757.html
It had a couple of features that I still use, namely:
1) The ability to read in a text file containing a list of names, one per line, and using that to sequentially rename a selected set of input files.
2) The ability to set up a sequence of renaming rules (and save them in a rule file, like a .bru file), so you could apply a series of changes, with each successive rule acting on the result of a previous rule.
Can you do either in BRU?
If not, these are really useful features to have!
Thanks