I don't think the .800 matters much one way or the other. Hendrick has legitimate left-handed power and therefore will get a lot of rope. Moreover, if he does what he needs to do, cut the K rate, he'll easily go over .800 as his percentage of XB per H is well over 50%. On lollipop's previous point about his being a Pennsylvania cold-weather kid, I agree somewhat but I'm not sure that matters as much anymore as it once did as these kids play so much travel team baseball all over the country (often on nationalized squads) these days.