Hell, they could move the door that zones you outside the MH so it is up the stairs outside the current MH door (there is a little room there with said stairs, look next time you open that door), and have that door open up normally like any other to reveal a hall-like thing.
I do like this design though, and I can't see any reason why they couldn't atleast handle the loft, though how furnishings are currently laid out would have to be changed somehow.
If SE makes it so furniture doesn't take up item space, it would be a good idea. As it stands though, its pretty much empty space for most good players who like to utilize their space to the max.