You have to take into account that he is working with Hurts who is not a good passer and it's a team with Saquon Barkley running for over 2,000 yards. It would be pretty dumb to let Hurts throw the ball a lot when you have Barkley running the ball like that.
I don't honestly know much about Moore other than that he was see as a rising star when he was in Dallas and then took the fall when Jerry got madd and the Saints did interview him for HC in the last cycle when they picked DA. Things did not go well for Moore with the chargers, but he has done a nice job in Philly with a up and down QB in Hurts. He has done a lot with Hurts while others, including Brady and Kingsbury have had much better QBs to work with. Maybe Moore is the guy to work with Rattler and make him better or maybe he's the guy to develop a young college QB that is a better runner than he is a thrower like Hurts?
Moore would not have been my choice, but I do see some reasons why he might be a good choice, but you are right that it will come down to if he can lead the team and run an organized program.