Would absolutely LOVE it if you integrated a way to use regex to alter directory structures.
Going back in time a bit, I needed a way to shuffle songs from sub-folder to parent folder, while at the same time giving the parent folder a custom name (Artist - Album [YEAR][(FLAC|kbps)] through regex.
mp3Tag was my primary metatag tool... but at the time needed a way to deal with changes in directory structure for a set of files.
You could definitely do that in Opus, but would probably need either a script or to do it in two steps (unless you just want to move selected files into a new folder somewhere, rather than to an existing folder which is renamed).
I've worked quite a bit with dOpus' scripting and custom rules with regex rename files. May have to dig a bit deeper on directory mods
I've realized the potential was there... because of the references in the article I found, I wasn't sure if there wasn't something already baked into dOpus itself to work with it.
Devs have done a superb job with making dOpus better and better and better over the years. Definitely one of my TOP5 software