I've been using the ROM since yesterday, flashed it with latest (2020-12-14) FlameGapps full.
I have found no bugs until now, battery life is excellent. Thank you, devs!
Maybe I will try to root using the latest canary published by TopJohnWu 3 days ago, so I can see if it fixed the problem of having to flash that modified zip first.
Edit: Just tried latest official Magisk Canary (d0896984 (21102)) and it works flawlessly, correctly patches ramdisk. So there's no need to flash shady modded zips (I say shady because we don't really know what it does, we don't have the source code).
Here is the link for the specific version, in case anyone needs it (though I believe, from now on, it won't break anymore):
https://github.com/topjohnwu/magisk...d49a01574b5244cc4df7bf607be2/magisk-debug.zip