I also agree that a full DHCPv6-Server would be a bit of an "overload", what with keeping persistent state and all …

But for bird6 I'd appreciate another (small!) addition: The ability to respond to RSs with unicast RAs instead of the (usual) multicast. RAs.
(Scenario: Large L2s with wireless devices)

Unsolicited RAs (if enabled) should still be issued as multicast, of course…

Thanks for considering! 😉👍🏻

Clemens