It’s 1 year old, but on that page was mentioned “The IETF ACME group is working to develop a followup TLS-SNI-03 validation method”.
I don’t know much about the “attack patterns”, but I figured having 80 open could at least increase traffic, if not add actual vulnerabilities (I think that’s why I closed it in the first place, seeing lots of attempts. But that may be the same with https).