I know @Raymond Ebertt is busy with life these days, but I'm sure he'd be happy if anyone wanted to help with updating the theme.
In a nutshell, all you would need to do is:
- get familiar with apktool for decompiling and compiling apks:
https://ibotpeaches.github.io/Apktool/
- diff the last leedroid rom that had a theme against the latest leedroid rom
- figure out which apks have been updated in the rom since the last theme update
- diff the themed apk from the last theme with the latest apk from the ROM, and push across the edits made for theming
- compile each of the apks you've updated, and put into the theme zip
- profit.
it's not as daunting as it looks. the most work is probably finding out which apks you need to update. if anyone wants to try and needs help getting started, then let me know.