I'm going to settle this discussion, and then we can all move on to other topics. (Actually, I'm not going to settle it, because some people are unreasonable).
Braxton Miller's pro future is not at QB. When healthy, he struggled with certain throws, and while his accuracy improved over 3 years, no one wanted to see him throw 40 times to win a game. With 2 major surgeries on his throwing shoulder, he may not be able to throw at all for all we know. Braxton is a freak athlete and an elite runner. That is what his greatness as a college player is and where his pro future lies. He spends a year in a slot/RB/wildcat/situational QB role, proves his toughness and durability, and improves his draft stock for where he will be asked to play as a pro. It's in his best interests for this to occur, and it would also be in the best interests of OSU. Imagine the creative things you could do with Brax and Zeke in the same backfield. It would keep defensive coordinators up at night.
Then it comes down to Cardale and JT. Cardale's power running and big arm passing ability compliment what Zeke does perfectly. Zeke's running allowed the pressure to be taken off Cardale. In the Alabama game, Cardale did have to make some pressure, critical throws - and he made them - but as the game unfolded, Zeke's performance never put Cardale in the situation where he had to win the game. Zeke and Cardale's abilities allowed Herman to pare down the list of plays considerably. Ohio State turned into a downfield passing/power running attack, and it worked to perfection. However, that is not what Urban has done since he got here, and I doubt that's what he wants to do. It was what they had to do. It's great to know that you can, if you have do, and that is a credit to Cardale, but the base play in the OSU offense is the zone read. Correct me if I'm wrong, but Cardale ran it against Wisky, stumbled over his feet, fell on his butt, and we never saw that play again. It's not what he does or can do. East-west running is not in Cardale's arsenal. What he does do well is throw the ball a long ways with some pretty good accuracy - and he runs over people north and south.
But given what the OSU offense is designed to be, JT is a very good runner, a very accurate passer, a leader, he's tough and durable, he is intelligent and makes the right reads, and he runs that offense with incredible efficiency. If God were going to create the perfect QB to run Urban's system, he would create JT. With him you have every play in the playbook, and you have the capablitily to get the ball to every playmaker on the field - and that keeps defensive coordinators and head coaches up at night.
So, the ideal solution is for Brax to change positions, JT is the man, and Cardale is a number 2 who gets a series a quarter, or more if a power running/downfield passing game is needed to win a game. All three play, all three contribute, and all three get to build their pro resumes.
When Urban calls me in a week or so, and asks me my opinion, this is what I will tell him, and I'm sure he will be blessed, he will tell me so, and I will just say, "Your welcome." :)