Piqué is not too lazy, he just thinks too slowly. He's actually good in the air and wins almost any aerial duel if the ball is slowly moving towards him (i.e. when an opposing player or goalkeeper hoofs the ball) but he sucks at set pieces because the ball is too fast for him.
Slow,lazy or whatnot the point is he is a beast in the air when he wants to be which sadly isn't alot