I think what he's proving is that he can recruit a more complete team, especially on offense, and that he has a better OC. Dual threat doesn't mean a guy can't pass. We just think that because we haven't had a really good passing dual threat since McNabb (I'll accept Dungey but despite his numbers he didn't have elite passing ability). Put McNabb, Bo Nix, Caleb Williams, etc on this team and we would still prove we could throw and draw guys.
Sometimes people get too caught up in what style player a guy is. You see good teams recruit different types of players and adapt all the time. Saban had Greg McElroy and AJ McCarron and eventually went from Jalen Hurts to Tua Tagovailoa to Mac Jones to Bryce Young. If he can't choose a specific style and stay with it, I don't think it's smart for anyone to do that. It's not realistic to think we're going to get McCord clones or that trying to do that will be the key to sustained success. Stringing together winning seasons is what will do that. That was Dino's failure. He had 2018, but, despite the electric offenses the prior two years, they were losing seasons. Then he couldn't put enough of a team around Devito to build on 2018.