Let us appreciate the Klingons through the ages.
Starting canonically with ENT
Worf and the Klingons behind him
K'Ehleyr: Half Human
B'Elanna: Half Human
B'Etor and Lursa
Abrams Star Trek
With what we've seen before, I see nothing wrong with JJ's interpretation of Klingons. Creative liberty aside, JJ has stayed true to what defines Klingons in the fans eyes.