The good news today is that, after spending some time in the workshop / barn, I really didn't get the claustrophobic feeling I anticipated. Maybe because the trusses are exposed and there is not a finished ceiling. In any event, I think it will work out OK.
We are meeting with the window man tomorrow to work out some last minute details so the framers can proceed with the Main Floor walls on Monday.
They have bottom plates of the walls all in place on the Main Floor so you can get an idea of how the rooms will be laid out. After seeing the layout of all of the wall partitions in life size (vs on the house plan), I'm having a little uneasiness about the floorplan. Many rooms seem to be real small, despite the fact that the overall square footage of the home is pretty decent. Can't seem to figure out where all the space went. Guess I better trust that everything will be OK or do a real fast design change before Monday.