Well, I traced the front, back, and sleeve patterns:
Then I added the 1" in length to the bodice, and increased the arm pattern:
And straightened out the new sleeve curve:
Here's a blurry closeup of the front:
I feel like I need to raise the bottom of the armhole up again, since now it hits too low- but the bust dart hits a little better place. I didn't pinch out the dart at the inner corners of the neckline since I wanted to see just the extra length. I'm wondering if maybe an inch was too much to add and I should fold out a half inch. Hmmmm.
The back definitely needs a swayback fix.
My brain is kind of mush so I'll keep this short, but there we are- muslin #2 of vogue 2253. ;-)