what do these files do in the system:
Ok Google needs at least nano gapps. Did you try that? I tried it and it worked (well I've to literally shout Ok Google, but it worked)
From where are you updating it? If last Nitrogen version, then it shouldn't be needed. Try it, but if somethi...
So I found a fix for the slow wifi problem. Its as simple as turning off wifi scanning in location tab.
This ROM is near perfect, one thing I noticed that the google play downloads are very slow over wifi, other apps seem fine
Did you try this on any other Oreo ROM? If not, try that and report back.
I did infact, LOS 15, it seemed fine there