I just want to make a point here. Cruise Critic already amended thweir Q & A once - so I sewe no reason to take it as gospel.
Plus, the bottom line is that the price guarantee is what you see on the RCL web site, not Cruise Critic.
I checked with RCL about two things:
1. The new price guarantee starts when you make a reservation (a deposit)
2. The old price guarantee is gone.
Bottom line, as time goes on, despite what they say in Cruise Critic, if it is not written in the RCL Best Price Guarantee then it is not a done deal.