The south lounge complex is well, well overdue an refit so I would not be surprised if there is truth in all of this.
It would certainly make sense to start with the CCR and I’ve also heard rumours about “turning left after security”. I’d also heard that some of the footprint of the shower area was to be turned over to the CCR so that F passengers have their own showers within the CCR.
As for a temporary CCR in the B gates, I really don’t know. As an occasional F flyer it would not bother me as I have to go that direction anyway for most long haul flights. I can see how it might be an irritation to short haul GGL passengers though (alas I am no longer one of those!).