Justin has all the extras, but he doesnt have the core. Youre right, you cant always be a pocket passer. And when things break down, very few int he league are as good as Fields.
But you gotta be able to read a defense and throw the ball in rhythm. You have to have some % of your passes that are thrown where and when they are supposed to be as you draw it up. You can add backyard football on top of core QBing, but you gotta have the core skills too.
I also agree about the gameplan - making the most of Fields' strengths. But you can be Wildcat offense as your base offense. That's College option football,. and as you see, you can stack the box as an answer to it.