The schedule was pushed back. That's the only change. Could the schedule be pushed back again? Perhaps. But speculations about various other unspecified changes are entirely imagined and not based on the evidence.
> If you have an inside scoop on how this is unfolding inside Google, or have worked there in the past, then you'd be in a better position to know.
I'm a professional browser extension developer and have been watching this closely for quite some time, for obvious reasons.