Mac Jones is our QB1.
We had a QB here in town for many years that people had a lot of faith in, and who was very successful. Early in his second year as a starter, he went through a string of 5 straight games with an interception, 3 of those with multiple picks. At the time, and over that first off-season, he was the subject of a lot of talk that he was a pure system QB, a game manager who didn't have a lot of arm talent and wasn't a guy who could win games for you. He was pressing, testing himself, seeing what he could and couldn't do. It was probably a good thing long term that he didn't experience high levels of success when pressing like this and pushing the ball down the field - he shifted back to taking what he was given, but also dedicated himself to developing his arm and physical gifts to give him more options.
I think Mac is in a very similar spot right now. The new system is part of it, the coaching is part of it, but I think some of the talk is in his head, and he's gotten to where he is today by never accepting people's assessments of what he couldn't do.
That doesn't mean it will turn out the same way. But I think he has the personality to head down the same path. He'll be fine. I'm glad he's testing his limits, and while it's painful that he's finding them, it should be a good thing overall.