Just the typical CIS obsession with height (and weight).
Just from those pictures and seeing him work out with Cam, I’m confident that by the time hes ready to play his sophomore year, he will be a legit 6.0 or just a shade above. Tall enough. That’s not even a thing to worry about.
And he has the arm.
What he has to do, like any quarterback his age, is continue to develop his mechanics, processing speed, leadership, etc, etc (Cam attributes). I have high hopes.