What I'd like to see him examine is just what happened to that "Talented Tenth" that at one time existed within and may have allowed a vibrant and often successful parallel black community but today seems lost, misdirected, or possibly exiled from, that community.
Fryer appears to have some link with that part of the past and I'm glad he makes use of it.
He could also go to the core of that 'salty slave' theory by looking at Jamacan immigrant families, African immigrant families, and ancestors of American slaves; I think he'd find a great difference in the hypertension scores based simply on where people believe their ancestors came from.
All I can say is that there was a day when Harvard would not have touched a man from a family of convicted criminals who did not know the date of WWI. He should have already produced significant research in a doctoral dissertation, but I don't see any important new contribution documented. Best wishes to him, though, being a token is a hard way to go.