So far so good. But now let’s assume that I already have a latex document with references with the old keys, e.g. one to author_foo_bar_baz_2019 . Now I have to manually write down, during the merge process, which key changes into which so I can find-replace the old keys in my latex files.
You might be also interested in the new LaTeX integration feature which @davidemdot is currently developing during GSOC. I think this could be an interesting use case as well.