The other development, is that #LibreOffice now supports automatically enabling optical size axis (opsz).
More in: https://bugs.documentfoundation.org/show_bug.cgi?id=153368#c9
This also sets up some infrastructure for supporting arbitrary font variation settings (so fare LibreOffice only supported named instances), which I would like to tackle next.
Support for named instances is a bit of a mess at moment as well because LibreOffice never properly supported font styles outside weight/slop, but I have some ideas to sort this out at some point.