If we decide that an RDDS is needed, we’re going to have to find a way to provide that service using one of the options (WHOIS, WHOIS++, RWHOIS, IRIS, or RDAP) that are already available. RDAP is our best option.
+1.
Confession. My interest in these matters always cleave to the end game. So I have spent a lot of time digging and was lucky enough to be tutored some. [Largely by Scott in an EWG subteam.]
On the balance of the evidence and given the endgame, I am unanimous that for a functional RDDS with a certain form to it, RDAP and its evolution seems our best bet to address all the known registration data issues and to project a globally-acceptable framework here forward.