A lot of the comments here really are personal preferences. One man's high gorge is another man's perfect gorge. One man's too must waist suppression is another man's trim silhouette. And I feel like the top button could be below your crotch and someone will still say to lower it.
Personally, I like to see conversation, and commenting in black and white isn't conducive to that goal. Especially when we don't know what aesthetic you are trying to achieve. Do you lean toward modern and/or trendy, or more traditional? Do you love Richard Gere's style in American Gigolo or Ryan Gosling in Crazy Stupid Love? Do you hang out with power brokers in RLBL, or accountants in JAB? Do you live in Paris, France or Paris, KY? I try to be a realist and compare things relative to something else. Saying that the gorge looks a little trendier than traditional is more helpful for conversation than "that gorge is too high." So I'll throw out one more opinion, from what I would consider a realist perspective... to anyone who doesn't follow fashion as closely as most SFers, this jacket looks damn good. Sure there are probably some cleanup items if you go with the pickier details, like the shoulder pitch. Then again, you'll be moving what 98% of the time you're wearing this thing, so it might be tough for anyone to see if something is weird with or not. And does it just need to be steamed or is there really some odd extra fabric floating around the back?
(I truly don't mean to come off as a d$ck to anyone who posted before me. It just cracks me up at some of the nits that people come up with. Then again, you asked for opinions and got a bunch of them. If you had your own doubts about the coat and were looking for ammunition to take it back, or if you're just interested in some tweaks for the next version, I suppose you got plenty of both.)