Oh how lucky!
Love the outlets in the ceiling, been wishing I had them for my LA. I would suggest playing with your layout to see if you would like any outlets in the middle of the floor. I just put up some cabinets, love them. You've covered windows, what a view; closet; outlets.
The only other thing I can think of for the construction process is your flooring choice. If you are in an area that gets very cold and you are going to use tile you might consider one of those hot water heating systems they put under them.
Oooo I saw a quilt rack you might like to get put while the mess is in underway. It was wooden, it looked like a pole with wooden rails sticking out that could be swung around. Let me see if I can find a picture, my word picture is terrible!