I'm sitting here at work without building numbers/layouts easily accessible, so I have to ask--what resort are you asking about, and what exactly do you want to know? I've stayed at both ASMo and ASMu, although Mo has always been Mighty Ducks, so I know that wasn't building 1. The last time we were there, the CM said that was the only building with king rooms, so I guess that's why we're always playing hockey!
As far as ASMu goes, we did stay in Calypso once, in Feb. I don't know if it was building 1, but it was certainly close & convenient!
My experience is that the king rooms at the AS resorts are comfortable for the 2 of us, and we don't mind the walk-in shower at all, if that's what we get. We have a king bed at home, so we always ask for a king room when available, whenever we're staying at a WDW resort.
I don't know how much this will help you, but perhaps it will spark some conversation!