I have seen that pic of Slewfoot. One thing to note is that his arms are not hanging straight down. They are bent a bit at the elbow and possibly(though maybe they hang there naturally)
or thus pushed out a bit and cover the shape of the bottom of the jacket so you cannot quite be sure how it ends. If there is another pic showing it, fine.
But from this one you cannot tell if the skirt comes down straight(as we both prefer or anyone with any sense would) or is creating the bell shape.
I see the angle that you speak of near the waist and while it is fine for me besides not knowing about the skirt, the front of the jacket is not looking proper around the top bottom. Due to the arm position?Could be but I cannot say from this photo and default is that there is an issue.
As for your pic, while the skirt is to the bottom of your thumb, considered low or 'not short', I think you would benefit from more length and more closed quarters. Or because it is a relatively high button stance for 2B could be a factor. You mention DB and the whole thing with those is they are, generally, longer even when the same overall 'style' as SB.
Also, if the style of sketch A/slewfoot goes awry, projecting a small chest and large hips is not becoming of a man. Child bearing hips are for women. Well, I don't prefer those on women either but nevertheless.
Since you have artistic skills, just draw in a bit more to your jacket on your photo. A tad on the quarters and the length and you will see. Finding a color to match closely should be easy enough to get a good idea of it.
What is ironic is that the issue you seem to care about is the same that I mentioned about all those fancy suits that are wrong for the wearer except in yours, it does not give an awful impression of your physique. But there is 'something' off.