That's weird. Ubuntu has two tracks, the standard that gets updated every six months and the LTS track that updates every two years. I think the developers recommend the LTS versions, and it's the version I see that tends to get better corporate support. But even on LTS you can find some oddities sometimes I suppose.
I don't really see why it's such a dealbreaker for so many. Hardly any phones have 3.5mm, and for those that don't, you can just put a dongle on the end of your existing wired headphones.
If it has an AMD GPU you can just install it now, no waiting. But it's not good at much more than just playing games, if you want a more general purpose machine I'd install something mainstream like Mint, Ubuntu or Fedora.
I'm okay with the camera on the 6, but no it's not as good as a Pixel, nor does it open and take pictures as quickly.