....Jerry, Stephen and Jason ALL said at SOME point in that three week interim words to the effect that the 2019 offense will be a group effort, what with the people in the offensive room who were already there... Nussmeier, Columbo, and Kitna were all specified as having input.
Moore, then, is the coordinator in the actual sense of the term. He is not going to function as the offensive "director," like Linehan did, and in whom Jason had confidence because they had always worked well together.
Ultimately, it ALL is Garrett's offense. Succeed or fail, Garrett will be responsible. Moore will heavily coached up by Garrett as to what can go in the playbook, and what plays can be called when.
Mere speculation? No. Well-informed, only-reasonable speculation.