Part of it is play calling but part of it is that Miles isn't particularly good at any one thing. He doesn't have a good arm, he's pretty big doesn't have the physicality to match, his accuracy is subpar beyond 10 yards, despite being a good athlete he is slow to accelerate, and he doesn't have good speed. His biggest strength was supposed to be that he took care of the ball but his INT was horribly thrown and couldn't have come at a worse time in the game. Then, in the second half, he tries to get away from a pass-rusher (what worked for him in high school doesn't work in big-time CFB) but he ends up with fumbling the ball without being touched. Who cares if he completed 67.8% of his passes if he turned the ball over twice and only averaged 5.3 yards per attempt?
Our RBs are pretty pedestrian and we don't have an effective bigger WR with KW not what he was last year before his injury.
Not having Riva hurts and IMHO, Charles isn't playing as well up at 315 lbs rather than 300-305 lbs that he was last year.
I fully understand that the back-up QB is usually the most popular player on many teams but Williams simply LOOKS like a QB to me and may have the "it" factor. To my eyes, Miles does not look like a natural QB and he doesn't appear to have that "it" factor. Miles probably has the highest floor of the QBs on the roster right now but Troy Williams likely has the highest ceiling.
But no matter who the QB is vs. ASU, they will still need more help from their OL to give them more time, the RBs to average more YPC, and a 3rd WR to emerge beyond Mickens and Ross. Is it time to give Pettis and Lenius more PT (Pettis had 3 catches yesterday and Lenius had 2)???