You're almost there, but your premise isn't correct (respectfully).
Cam came in and all Dawson had to do was get TF out of his way. It was a partnership and it worked, because Cam was an advanced QB as a passer. IQ and preparation thru the roof with elite arm talent.
Milroe. Ain't. That.
And Dawson's playcalling hasn't always been great. Cam got us into the right play more often than not because of his freedom to audible and his preparation/recognition being an elite level in addition to his arm talent.
Your premise is basically that Dawson will get out of Milroe's way and let him ball and all will go well...or that Dawson will call plays that maximizes Milroe's strengths. I'm not buying that, man. This offense is a system, and Dawson's gonna call the plays within the offense he needs to call...most OC's do that because they don't want to be limited in playcalling. It can't be Milroe left, Milroe right, Milroe throws a 50 yard bomb. Milroe is gonna have to come in and adapt. Maybe he can? But what he's put on the field so far at Bama says he has some big shortcomings in those areas. That's why I'm skeptical.