No, he doesn't need to change that. I don't mean to sound threatening, but if you are going to point anything out, especially as specific as this, you need to make absolutely sure that you are on the right. Way too many errors happen because people keep repeating other peoples mistakes based on hearsay.
He also doesn't need to lower his thighs. They are supposed to sit high. You would not want to look like the guy in the middle,middle row, but more like the 2nd from the right on the front row.
The real "problem" with the thighs is that they are not tight enough, so the curve that is at the top back of the thigh is not a smooth curve but kind of flats out at the cover strip before it starts going downwards again. Slimmer thighs will get rid of that and at the same time remove the material that covers part of the butt plate.