The notes in white (on the left) are the things I think went wrong. The ones in yellow are my plotted corrections.
A little research into the dangerous territory of bust darts (which I admit, are not my favorite thing in the world), yielded the following gem of an article by Friend of Knitting Amy Herzog:
Why You (probably) Don't Need Short Rows
Thanks, Amy! I had a sneaking suspicion that short row bust darts don't really solve all problems, and now I can prove it. Amy's elegant solution is to add more stitches vertically, which I can totally hide adjacent to the center panel, and then take them all out a few rows later. Poof! More coverage up front, and hopefully no more armhole gap.
And although I never thought I'd hear myself say it: The picot edgings on the armhole and neckline are totally not working here. I'm going to have to change them to something with a little more backbone.
Having emotionally committed to the frog-out, I'm actually looking forward to getting this fixed. It's like an itch I have to scratch.
Sure do wish I hadn't woven in all the ends, though.