Telling the cabin crews which exits to use is non standard on Airbus at least. It used to be like this few years ago but not the case anymore. Sure informing them that the aircraft would be in an unusual attitude is a good call but the flight crew should not decide which side or doors to use for emergency evacuation since they have no clue if the situation at each exit is safe or not. The call out by Airbus from the PIC on the PA is: ''Passengers! Evacuate!'' Nothing more.