Unfortunately, not enough for us to recommend it yet.
They did put out a quick bug fix release (0.92.1) in February release to correct a couple of major issues. However, they are still recommending that Mac users stay on 0.91 for the time being. Between that and the physical-DPI change between versions (ugh), we have decided to continue to recommend 0.91 for all platforms for the time being.
If you have a use case where it’s important to get the AxiDraw up and running under 0.92, please let me know what that case is and which platform you are on, and I’ll see what I can do.