Agree, I really wanted netavark to work - it definitely seems like the way forward. I enabled it and out of the box none of my containers could resolve DNS, even though aardvark was running. It’s so new I wasn’t sure where to poke around, so I went with the legacy method.
I’ll try again once it stabilizes in Gentoo, somebody else noticed netavark should be the default now and opened a bug with the maintainer.