If you did a quick search you'd find that "msmtool" is the requirement to go back to stock
I just tried msmtool and it nearly bricked my device and did not work.
Seriously?! It's so simple to use; ah well get a fastboot rom then
I honestly don't know if this rom is going to get an update. The OP is not active at all.
I'm using Lineage OS, auto brightness have been improved but still has some weird behavior, I wouldn't say "Fixed".