Thanks, dllopis! It looks like the IPv6 DNS issues I was seeing was because I had the wrong delegated prefix (I was using my transport range, not my network range). Changing to what you showed and making sure I had IPv6 DNS servers configured look to have resolved the issue.
You seem to be listing two separate IPv6 LAN addresses in the screenshot you have there (one is entered, one is the expanded address on the right)...in my setup I'm using the base address given to me with the delegated prefix and it seems to be working (when I tried using the IPv6 default route address as you did in your expanded address things were definitely broken).
Still seeing some fragmentation issues (that I posted about separately) when running netalyzer but I doubt there's anything I can do about that.
You seem to be listing two separate IPv6 LAN addresses in the screenshot you have there (one is entered, one is the expanded address on the right)...in my setup I'm using the base address given to me with the delegated prefix and it seems to be working (when I tried using the IPv6 default route address as you did in your expanded address things were definitely broken).
Still seeing some fragmentation issues (that I posted about separately) when running netalyzer but I doubt there's anything I can do about that.