The only thing I've seen proven so far is what we already knew in that the Rooney rule is fundamentally flawed.
If the league really feels like they have to step in for inclusivity, they'll probably find a more productive route with their draft picks for promoted assistants idea I guess.
At the end of the day though, I think the most natural thing is to let it go the way of the QBs. There used to be no such thing as a black QB and it's slowly become a non-issue with the best man winning the job regardless of race. And it didn't take league intervention to happen. Imagine if they did though. Like hey, here's an extra draft pick for every black QB you draft. It would completely cheapen the experience for that player and turns them into a token. And it does the same thing for coaches.
Anyway, that's all I have to say before the lock.