@DazzyWalkman tried your DazzyWalkman/lxd-openwrt-simplified to setup an openwrt based OpenVPN gateway using VPN Policy-Based Routing + Web UI -- Discussion. Its a bit more simple setup than what I used before but so far all looks good, e.g. no kernel shoutouts in the log as seen last time I tried it.
Still on my todo-list before I consider using openwrt in a container again the internet facing router in the household, I need to try your script for loading SQM modules in the container + see how LXC handles passthough of physical NICs (that may have been what caused my issues last time).
Anyhow, it was really simple to build a container using your script. I tried the latest stable release openwrt-19.07.3-x86-64-generic-rootfs.tar.gz.
Are you using this as your daily driver?