Dirty flashed today's nightly over 1217 (didn't update to the new recovery, used the M2 one) and now adaptive brightness and LiveDisplay seem to work fine (previously I got a BSOD on resuming from deep sleep so I had disabled them both). I've disabled the stock camera from the beginning on this ROM and have been using Google Camera. I'm also getting a reboot when I open the stock gallery on this latest nightly so I've also disabled that and I'm using Google Photos, which seems to work fine. I'm also able to record video on Google Camera, even after deep sleep (previously I could record video with Google Camera just after a reboot, but once the phone had been in deep sleep it only recorded a freeze frame and the sound).
TL;DR every nightly is getting better, so thanks to @TheStrix!