On one hand, I think it's a great hire. Morris really turned the Falcons around when he took over. On the other hand, if he does well here, I guarantee he's a NFL HC after the season. But there are much worse outcomes than that. Morris is not married to a traditional 4-3 Cover 2. That was what he ran when he was HC because he came up under Monte Kiffin. Since that time, he has coached under people who have run a traditional 3-4 scheme and Pete Carroll's multiple scheme (tends to look like a 4-3 but uses personnel from the 3-4).
With Morris, I would expect our defense to be multiple, which is just fine.