Mostly wherever you do nat, you will still have a session table in IPv6 because it's a firewall.
On home lans, the issue is rubbishy kit breaking connectivity. On enterprise lans, bonjour is not a good thing, and troubleshooting without dns is certainly a thing. That makes things harder with IPv6.
We probably need routing protocols to include not just addresses, but names, which provides local resolution with the same trust level as numerical addresses. That's not dns, that's just route mnemonics.
Then IPv6 would be a lot less scary.
We could also start demanding voip over IPv6 only, so we can blacklist those scammers.