Another thing with this fork that leaves a bad aftertaste is the overwriting of class version numbers, sometimes with higher revisions than existing MUI components with more advanced functions.
This breaks version checking in existing MUI software, and it also makes writing compatible software very hard for developers who want to support all platforms. Not a good thing to do if you want more available OS4 software.
Considering that this project started to get some MorphOS software ported to OS4, it seems quite counter-productive to do stuff like that.