Heaps has never been good at long balls. One does not simply throw the deep ball to your great receiver and it's all peachy. Heaps hardly ever had long bombs caught. Most of his "long" passes through his career were like 25 yards.
I'm definitely not sure about Stewart and I won't claim he is anything... For the same reason I get after people claiming Olsen was so great even though they had no proof.
But wanting Heaps 2.0 is just dumb. We've seen what he can do already, why go back to that? When you have a couch and can't stand how it feels, you don't go buy the same one two years later.