I don't know how often these features get used, but I would vote to not make this a big deal. I would say include it in the list of bugfixes in the next point release, but it may not necessitate an email to the whole list about the issue.
Notably, I ran into similar issue last week during some analysis with the cylindrical coordinate system, but I tested it first to see if it made sense. I anticipate that other users would do the same thing instead of just assuming its all correct, but maybe I'm wrong? I've been meaning to make a bug report on the cylindrical dataset, but maybe your PR has corrected the issues I encountered.
Thanks for your and Philipp's work to correct these issues!