Good to hear, Gerrit does a lot of things right, see "stacked diffs" (or the realization that GitHub lacks these) now becoming more popular. And the patchset model is one important aspect of that, especially being able to see the difference just between patchsets - which git-pr can then do via `git range-diff` (which you already mentioned).

And even if everything git-pr does could be done by talking to the Gerrit REST-API, a simple straight forward and lightweight implementation of the "essence" of this model is very useful.