Terrible pictures of another muslin, just what you wanted to see! I kicked and screamed my way through this one. The improvements are many, so I don't know why this process makes me so cranky.
Anyways, I raised the armscye 3/4 inch and did a narrow shoulder adjustment to take out either 1/2 inch or 1 inch, I'm not sure (I overlapped 1/2 inch at the widest part). I also added width to the waist with a pivot adjustment. I usually just grade out in the seam allowance. I don't know if there's any big difference there in the outcome, but I felt like a very proper seamstress. Finally, I went down a size in the sleeve side seams to take out a bit of width. The back shoulder area still looks a little broad to me. I'm thinking of redrawing that back armhole line from the armhole edge to the shoulder to bring it in a little. I'm sure that's not proper at all.