I think you're still missing the point. An 8.0 is an excellent rating. How could that not be a positive thing? Of course include it in his bio if you want.
But he still has to perform.
I know of a player whose best rating was a 7.5. He'll be at the #23 ranked JUCO in the country this fall. That's a pretty good baseball program in my book. The coach never asked him his PG rating.
I know another player who was an 8.0, top prospect 2 years in a row. He'll be lucky to step on a field anywhere due to grades and test scores.
It's clear that the evaluators at PG think pretty highly of your son's potential. Take it for what it is and move on.