Both good posts. Perhaps Diaco was brought in to be groomed as the HC in waiting as we are going to the 3 - 4. I feel pretty confident that we are on the correct path back to relevance and playing for Championships.
That's what we do best; jump to conclusions with assumptions that have no support.
If Diaco is really successful it's more likely hel'll move on to another HC job before Riley retires.
I doubt that it's a HC in waiting thing, which I hate fwiw. I just would think that if MR is successful here it will be largely due to him bringing a great staff together and therefore have a natural progression when he retires.