It's not Black it's Dusty Baker.
There are two immediate take-aways from this news. One is that the Nats organization is pretty much a joke right? They lowballed Black. He refused and they went with option #2. Whatever crazy reason you can come up with for the lowballing - cheapness, Rizzo wanting out, MLB hiring asking for a favor - it does not look good.
Second is that - Dusty is a fine choice. Not a great one, but certainly no worse than Black if we're trying to be objective. Dusty has won more, has actually been to the playoffs and the whole Prior/Wood thing is both overblown and over a decade in the past. He does have his issues (teams should take a walk now and then, playoff managing hasn't exactly been stellar) but I'd expect that he should be able to make the Nats successful.
We're now in the info gathering stage so look for more takes to come.