Do you think your issue with his jacket could be because of the crease created by the pulling on the button? I don't think it is too short, or the button stance is too low. It might be on the edge of "too much" for either, but I don't think it goes over the event horizon. I do think the crease, and accompanying shadow, might give the illusion of it being too short by breaking up the silhouette. I dunno, just a thought. What do you think?
Looking again, it might just be the combo of the very fitted jacket with his top-heavy athletic looking physique. Again, I do like the combo a lot, something just looked a little off on first viewing.
That's what we do here, wouldn't be SF without over-analyzing