We love deck 5 cat 8 rooms. We have been in 5012 and it is our favorite. You are close to everything on the ship. Up a few floors to deck 9, down a few floors to the restaurants, shops and nightlife. And the area is very quiet as there are not many rooms so you avoid a bunch of foot traffic. For our first couple cruises we booked a cat 6 on deck 6 and didn't realize how noisy it was until we had our cabin on deck 5 forward. We have also stayed on deck 6 and 7 in cat 8 rooms and love the deck 5 area the best.
As for the safety drill, the drill is outside. The inside location is for those in the aft section. I don't want you to get your hopes up and then end up disappointed.
You will love the deck 5 location. But shhhh....it's our secret.
Have a great cruise.