My problem with the balcony-on-the-rim idea is that the window arrangement doesn't look at all unified. As if each window group leads into several different rooms rather than a lounge. I mean, why make such a disorganized window arrangement if they're all leading to a big lounge? They're different sizes and shapes, and not really lined up at all.
The smaller size works ok, but the 1080 size works so much better.
Anyway, as far as the refit goes, I'd make the nacelles round and have a swirling bussard dome on the front of them - ie, make them more TOS-like, and loose the art deco. That's about it.