I did a number of modifications to this. The most obvious; full length, tapered sleeves and added about 6” in length and made the shaping more gradual. No ribbing at the bottom edge, I did 5 rows of garter stitch instead.
(I also cast on for the 40 3/4 size and decreased to the 38” size.)
The major mod was to the neck, I decreased 8 stitches each side and changed the back neck as well, I knit up from the back neck stitches attaching it to the front extensions as I knit.
I used Frog Tree Sport, loved the yarn! I love my sweater!