I remember looking at this when I did the split, and there was one or two complications to changing the "elpa package name". IIRC, info files in other packages needed to be changed. I don't know if those issues still exist; the info file for emacs-goodies-el should be gone by the buster release.
- Bug#912281: elpa-devscripts: please change Recommends to elp... Julian Gilbey
- Bug#912327: there's a bit more to it David Bremner