I think the Adcom window is closed with the exception of FDA moving the PDUFA date, which they could always do. I suspect JT gets word from them of no Adcom very soon and I think it's time to begin a debate about how far in advance of Sept 28th FDA might go ahead and approve the expanded label.
BB, FDA could shorten the PR review time from 6 months to less than 6 months bot not lengthen it, imo, then it is not Priority Review in my mind. No precedence in the later case, imo.