Personally, I verbiage, speed of the game, and defensive reads would be the biggest adjustment for Zach. I saw him play, and he always had great footwork in the pocket, and I think sixman helped him with mobility in and out of the pocket. I didn't hurt that he grew up in a household who believed in preparation, so I'm sure film sessions were a strength, as well as the fundamental basics of ball control and footwork. It also helps that he's a great kid.