Sanheim last three seasons, 31, 21, 35 ES points.
Ghost's best seasons, 32, 32, 27.
Now Sanheim isn't well suited to the PP b/c long legs makes it harder for him to maneuver around the blue line. Ideally, your PP QB not only has good vision and passing skills, but is able to move well in a short area and maintain puck possession waiting for a play to develop. At 5x5, his long speed allows him to pressure defenses as a puck carrier.
I think Flyers will be looking at offensive D-men in this draft, though it would be nice if York, Drysdale or Andrae could step up and take the role of PP QB.