Thank you for your post - We were on the May 13 cruise and stayed closer to the Aft. Frank Del Rio was on our cruise and gave an informative talk to the Cruise Critic folks - and he said that at the aft they installed some mechanical equipment that would meet some energy saving requirements, and this caused a bit of a redesign of that part of the ship. It likely pushed the kitchen galley spaces and restaurants more forward and could have caused the elevator change.
From a enjoyment standpoint - we use the stairs quite a bit - When we used the aft stairs, it was always with a plan to stop off at the lounges before dinner. So in that aspect it made things a bit simpler.