Yeah that's exactly the matter.
If i'd add another floor on one of the corners it would look some kind of "wrong". I made one plan for the whole map and now i'm done with it. Like i said, i'll see this map as a warm up and start the next (better) one .
Well that is good to hear!!! Now polish the crap out of this sucker and make it as beautiful as possible! Detail! Detail! Detail!