Why does Langley need your forgiveness for not supporting DANE? DANE is arguably worse than X.509 CAs.
It seemed to be our best attempt to get SSL for every website. CA-based certificates just won't cut it.
(I doubt this is what's held up DANE; rather, the unreliability of DNS compared to hyper-optimized HTTPS/TLS connections is the issue there; browser vendors care about milliseconds.)