No, not at all. I am looking back at last year and assessing it at face value. I say often, probably on this thread as well, that players can and do improve. By all accounts, Zion is a great kid. He gave it give us everything he had. He made meaningful contributions. I am also saying that any competent coach or even casual observer knows, absolutely, beyond any reasonable doubt, that our QB play held our team back. It was a negative not a positive. Both the eye test and statistics clearly bear this out.
But I find your professed ignorance of "coach speak" unusual in a sports fan. Coaches are not fond of giving away information. They like to talk and say nothing at the same time. They also like to keep problems in the locker room. It's important to them to let the players know that they have their players back. So when you hear Mora say "Zion was a big part of our success we had last year" he is not really saying anything. His opinion of our QB play is reflected in his actions moreso that his words. He is holding an open competition at the position.
I suspect you know this.