Not uncommon for a new protocol. Question is whether they will get around to it.
> the protocol is under rapid development, with extensive rewriting of the protocol occurring over the scale of months
Once it stabilizes, I don't see a reason why it couldn't go the same route SPDY -> HTTP/2 did. A faster internet is a win for Google.
(I work at Google, but I'm not aware of the QUIC team's plans).
I guess Google will still continue to experiment, but then probably based on the standardized version.