The ONLY problem with deck to is other peoples perception!! When we have stayed on deck 2 and told other people where we were staying the usual response was "Oh Down There".
Lots of advantages to being "down there".
Disembarking on Port Days: you go forward or aft - where ever they tell you to go and down 1 deck and you are in the disembarkation area.
Going to Parrot Cay, just walk to the aft stairs and go up one flight of stairs. If Animators Palete is your destination, just one flight above Parrot Cay, and you are there. Need to goto beat street/Rt 66, go to the forward stairs, up one flight and you are there, if you go up 2 flights you're at the Walt Disney Theater, up three flights and you are near the kids clubs. Goto mid ship and up one flight for Lumiers or Tritons, up another and you're at the
DCL shops and near Studio Sea and shutters.
You notice that I keep mentioning the stairs. The Lifts (elevators in USA speak) are mostly there for looks. Kids age 5 to 12 use them as their ride (you know we are not at WDW) They seem to like to go into them and push ALL of the buttons! You can wait a long time for them and when you only need to go 1 or 2 flights, its much quicker to walk.
So that leaves deck 9 and 10. Thats a stinking long climb up the stairs. And the first day or two it is a lot of hard work, but by day 3 you're starting to get into shape. Going down from 9 to 2 can be kinda dangerous if you get dizzy!! Since they are 1/2 flights you going in circles really quickly!
Take the stairs and enjoy all of the great food that DCL has to offer. They make a good workout. And that is the real benefit to being down on deck two. Along with the great view of the ocean out of those huge portholes if you are in a cat 9 room.