Sorry about this really late reply!
At the moment UCS is not still working in 2.8, but i think I’ll achieve this milestone. It should work for all aspects of blender as is done in transform code, this is the beautiful part
About double precision i blender i think it’s almost and impossible dream… who knows! should be of course a separate build with the aggravating of saved files not being compatible with bf-blender.
I have started (lots days after i would like to) to port things to 2.8 but first i decided to change the way is developed, and I’ll do things based on diffs files with help of a deploy script. At the moment is a bash file, so it’s only valid for Linux machines, as you may know I work on Debian. Apply patches dynamically is easy, but i would like to be applied checking dependencies with other patches, so a simple program is needed.
I’ll also share some things in patreon