Diaco's philosophy is sound. It isn't bend but don't break, that's not what is intended but happens when it doesn't work, it is more totally end gash plays and control line of scrimmage. Almost no blitzing. That is a good strategy when you have elite talent that can dominate, and corners that can cover. UConn had that early in Diaco's career (Jones, Melinfonwu, Wreh-Wilson, Gratz, Adams etc.) Think about how good that secondary was!
I liked Don Brown's strategy of screw it, we aren't smart enough anyway, just kill the QB. I think that works better in college. That strategy came about at UMass when players were having trouble with a concepts. He said....just tackle the QB. Biggest issue, as we have seen, is it is a bully defense that is susceptible to the big plays. If you have a team that can execute at a high level they will exploit the over aggressiveness.