It took me a long time to think about it, but here's my NFL comp for Daniel McCrea, an not its not Tom Brady:
Daniel Jones. QB with a bit of athleticism, not a cannon arm by any means, and decent accuracy, and a GM the unreasonably fell in love with him and overdrafted him. I'm predict Jones level success for McCrea. He'll get some yards and scores, but also account for a lot of turnovers. In two years, it will be McCrea's "make or break" year, just like Jones is going through this year. And bold prediction: In three years (if not sooner), billy will be on the hunt for his new QB of the future (again in the same style as the New York football Giants, who will probably be looking for a new franchise QB after this year).