I don't see how... May I ask how much of HBA you have seen before his injury?... To say he's not as slender or has the same amount of acceleration in my opinion is head in sand material... If you've didn't see much of him Pre injury try and locate some footage... I'm guessing there is plenty available...
You´re just paranoid man. If (if!)there is any change to his explosiveness, that would most probably be due to loss of muscle mass in his broken leg, which is just a temporary thing.
Can´t say I´ve noticed he is any less explosive/slower, so Im sticking with the paranoid theory.