Thought I throw in 2 more cents...
I think you've pretty damn well nailed it.

(Pixelmagic's too)..
Obviously there will be all level of tiny details that would be impossible to guess at this point, but as to a really good overall look and feel of the new design, I think this is really "it".
Believe me, I remember working on this thing, and making a
much bigger saucer, saying to myself "no f--king way!?!?"...but, that really seemed to match all of the different screencaps.
At this point, I'm waiting for the movie, and a flood of books to follow.
"The Art of Star Trek (XI)" "The Making of Star Trek (XI)",
"Scotty's Guide to Star Trek (XI)"...