Thanks all, what a wealth of comments. First of all, I am not offended by any of the comments; second, I think some level of disagreement is good. That is what personal preference is all about, and for those who haven't formed strong opinions, hearing the debate can help to solidify one's own thoughts.
First, the pictures. Yes, the first one is a funny angle that accentuates the short look of the jacket in front. I also don't think my right shoulder is 3'' lower than the left. My wife looked at the picture and asked "Why are you standing like that?". I just didn't have a chance to re-take.
The sleeves. Definite consensus that they are at least 1/2'' too short. I cheated a little bit here and am wearing a bespoke shirt for which I feel the sleeves are also a bit short (though to be fair to Chan, this is the one I was wearing for the fittings). The Thom Browne comment is funny; when I first tried the jacket on with one of my other shirts, that was exactly my reaction. For my preference, they are too short.
Did I gain weight? Well, this visit to HK was on a tail end of a 30 day vacation of eating and drinking my way through France, Italy, and Budapest, so it is certainly possible. However, as others have noted, I don't think this is the balance issue. Hanging the jacket, it is clear that the back is longer than the front, as opposed to my others which are the opposite. It is interesting to hear that this is in some ways Chan's house style. That may be ok, except for the fact that I came in knowing what I wanted and having a good reference. That they deviated significantly from this, is a bit disturbing (not much though). For my preference, I would like a bit more even balance.
Button stance. I think I prefer 1/2 to 1'' lower. I guess this will also provide more open quarters. Is this too risky to request without going through a full fitting process again?
Trouser lenth. This is how I tend to prefer them. I will leave as is for now, but maybe adjust my preferences over time if it looks too sloppy.
Bespoke vs. OTR? Tough call. I will do at least one more round with Chan, but I don't think I will stop by OTR on sale. To me, they just fill different needs. I really love the way this particular Barbera suit fits and feels, but Saks botched the alterations, which detracts a bit. There is also more variability in the Barbera suits depending on who made them. I like Isaia a lot.