Re: Claim: all IPv6 addresses are *PUBLIC*
"Most home routers offering IPv6 still seem to just expose the plain IPv6 address directly anyway. Not fantastic."
As long as they apply the _same_ firewalling rules on IPv6 as on IPv4 (ie, all incoming blocked by default, etc) then there's no major issue.
There are of home routers which mirror the IPv4 rules to IPv6 by default.