The end game for certificate transparency is that browsers will reject a certificate unless the server can prove that it has been submitted to at least two logs

The end game for certificate transparency is that browsers will reject a certificate unless the server can prove that it has been submitted to at least two logs. In fact, as of the next version of Chrome, this will be required of all Symantec certificates due to their past misdeeds. The fact that HPKP and CT have not been fully adopted yet is not a good argument against them when the alternative under discussion is DNSSEC+DANE, which has seen even less adoption and doesn't even solve the problem.