I understand that currently only the GL-AR750S is getting snapshot builds of the 3.200 firmware, however I think it would be nice to have it for the Mudi as well.
OpenWRT 19.07 brings a bunch of features that would be incredibly useful (WPA3, better LuCI rendering on client side, bunch of other optimisations).
The AR71XX imagebuilder repo already has a 3.3 version uploaded on GitHub (I presume 3.200 for the AR750S was built from this), however the builds from that are not equal to the 3.200 build available here.
There are a lot more background changes than just the transition to ath79. Kernel versions, program versions and so on. A bug was introduced somewhere, and just moving the GL UI over to the new OpenWRT version without any changes causes wifi instability which is very unfortunate.