I asked our GV Advisor about this yesterday, and while it doesn’t apply to us (we’ve already completed Bios) her thoughts are anyone pre-Bios should get their refreshed docs uploaded ASAP to get an appointment in the next few months.
Also the email blast from AIMA on 27-Dec seems pretty clear that applicants should get on with it now.
@tkrunning notes AIMA’s hosting some clarification meeting Thursday (9-Jan) for immi lawyers. Perhaps your lawyers are waiting for that, but otherwise I’d think it’s time to act now.