Yeah if you mean deprecating multiple parameters in one deprecation, yup that was another bit like the other suggested here included in my original proposal that I elided in the initial draft here for simplicity. I added it back, which essentially just makes making module, name and arg accept list[str] to apply to multiple objects. For two distinct parameters of the same function deprecated/removed in separate deprecation on different timelines, those could just be separate deprecation entries.
Totally! As part of that I also hope to rewrite the working prototype to read from the TOML (at least a core subset of the schema), construct the deprecation message in the docs and output the JSON/CSV.