We were just in the Sugar Loaf building (in a Lodge Tower room) and no rehab has gone on there yet. Which was okay by me. We loved the room as it was. And the extra space that came with having that room set up was GREAT! The rehab (that I could see) was taking place across from the Sugar Loaf building (looking out from Sugar Loaf it was the building to the left of the pool). We were there from 9/9-9/15.
We had a grand time (no pun intended) while there. I loved the room. We loved renting a cabana by the pool. I spent too much time at the Basin store there (and too much money if you ask dh). The concierge staff left a chocolate Mickey for my son's birthday and champange/a rose for our anniversary. We also ordered a beautiful cake from private dining. I will post pictures once they are uploaded.
I have two "not so favorite" things. First, the Sugar Loaf lounge was always crowded. I personally think I would enjoy the RPC lounge more. So next time, we will give that a try.
Second, dining at Narcoosee's...DO NOT dine there for a "fireworks view".

The outside deck fills up right about that time and the only view you have is of people's backsides. NOW, I will admit it was a beautiful castle view before the people lined up to watch the fireworks outside...however, watching the fireworks from our table was not possible due to the people watching on the deck right outside the window. Next time, I would eat earlier and then plan on finishing up a few minutes BEFORE the fireworks so that we could have a clear view of the fireworks from outside. Still, the food was good and the view was very nice until fireworks time...so it's not really a negative so much as a warning if you are planning on viewing the fireworks from your dinner table there. Hope that helps someone out!