Back in 2005 when I was working with Shane Johnson on a new Scott's Guide. The discussion at the time was that that lounge was going indeed be at the very front of the saucer section, behind panels that slide back and sideways to reveal the windows. In my opinion, it was too much of an excuse, like the reuse of the TNG engineering for 1701-A. I always thought that room should be where the forward port or starboard windows are on the ship, but then the window shape doesn't match...
Part of the book was going to be some 3d renders of some rooms like that one. You can see it here, if you scroll to the bottom of the page: http://cydonia6.com/about.html
(If posting the link is too spammy, forum monitors, feel free to remove this post).
Those snippets of deckplans are fascinating. Is there a way someone could see more complete versions of those?
--Alex