Thanks for the kind comments.
The suit will actually be going back for some alterations; sleeves and waist are both a bit trim for my taste. It's a much leaner fit overall--a little too much, honestly. I was aiming for something slightly less full than the sport coat pictured. I love the sc fit but thought this dressier suit would benefit from a cleaner chest, though not quite as clean as it is currently.
I'm so glad you posted this, because it addresses precisely what I didn't like about the otherwise very good fit, and was going to post along those lines myself, along with a big icon given all the praise it has gotten. The suit is just too slim-fitting, making it somewhat lacking in, well, I suppose grace is the best word. Your suggested alterations should fix that nicely! Nice display of critical insight.