We had a room on Deck 1 in October. The only inconvenience we encountered, other than the slow elevators, was that crew were constantly coming and going from their areas down there, so lots of traffic in the hallways - not noisy or anything, just crowded.
It was very convenient to get to the lobby, gift shops, Walt Disney Theater, etc. When we wanted to get to Deck 9, we would walk up to Deck 2, then go all the way back to the aft elevators, which are not that busy, to get to Topsiders, Mickey pool, etc. Or you can go all the way forward on Deck 1 to get the forward elevators.
We didn't have any problems with Deck 1.