Very good effort dude. Yesterday I installed this ROM through treble enabled TWRP with nano gApps and Magisk v16.7. Its P theme is top notch, I like it despite being a stubborn lover of classic O icons. Key things I found so far:
1. Super stable and smooth ROM with quick charge ability and deep sleep seems to work better than RR (my previous ROM)
2. Portrait mode works flawlessly for rare and front cams. However, video freeze bug is still there which can be worked out with Footage so not a big deal anymore
3. USB mode working fine with USB debugging
4. Fling gestures are bit messy and not fluent like other ROMs like, I have to keep my thumb for a slight moment before I can swipe up, if I swipe straight up than it scrolls up the app I am in or if I press a little longer than it uses the long press gesture. May not be a big deal for all the users but I deem it important because I find Fling navbar quicker and more fun so as a replacement I am using smart navbar
5. I don't see 'Schedule and Setting' icons when I swipe on the notifications. Strange; because I can click their Ghosts.
6. I tried Oreo QS tiles built in the ROM but its color scheme seems off balance because tiles are a lot darker when switched off so I feel that these are ON when these are not
7. I like P's grey mode in night and I am happy to see that a tile has been designated for Reading Mode which I prefer to have a quick access to; so plenty of thanks to the devs.
8. All the Magisk modules working flawlessly
9. Substratum styling for fonts and navigation icons working
10. Calling, data, wifi and sound level are all good