How does the reassure you? To me that reads:
Boys! We've been caught. Quick, do Jazz hands and pretend it doesn't matter!
That does not seem like a sane response to me. We move fast and break things and that's good is not something we should be hearing as a justification at this point.
And he's making a deal out of it being supported till 2018! A whole year! What do they think people are making on their framework? Apps that disappear after a year? Once you commit to a framework you'll be supporting it for 5 or 6 years.
Am I totally misreading it, as to me that is really not a reassuring response at all, quite the opposite. It seems to me that they've completely lost touch with their customers who want a stable, fast and predictable new version of MVC 4.