While I of course agree with the sentiment that it's "too early to call" and that of course as fans we "know nothing", I will say that I like the hire.
It's not a clear cut, no questions asked, someone is a moron for thinking otherwise type of improvement, but who were the people that would have been. For me that list is incredibly short - Theo, Anthopoulos, Mozeliak and I'd still say Cashman. Literally none of those were realistic options.
Once you get past that list, you're into the other names like Dombrowski, Cherington, Friedman, Rizzo, Click grouping, all of whom have their own questions and / or were still wholly unrealistic (DDski, Cherington, Friedman).
Anyone that could have reasonably been hired was going to have something lacking in their profile. So once we accept that, I like the idea of going for a younger candidate vs the second go around for someone like Huntington. Candidates like Breslow, Sestanovich, Fuld, Gomes, Romero, Levine and others are all pretty similar to me in that regard - and I'd be saying mostly the same thing if we'd hired any of those individuals, to be clear, because I think of them as fairly equal candidates - from the admittedly very limited information we have on any of them.
One thing I will say is that when all other things are roughly equal, I do like the hire of Breslow because of his coming from the "Theo tree" (which I'd pick over the Friedman tree, or the AA tree or whatever). Also, I think having experience in Boston and understanding that things are "different" in places like NY, Boston and Philly is a benefit. To be clear, I'm not in any way saying its a prerequisite or something that needs to be looked for. But when you have a large number of similar candidates, I think it's a good trait to use as part of a differentiator. As an example, it's why I'd pick Fuld or Breslow over lets say Gomes or Levine if I were making the choice.
So again, with the caveats of it's so early, and we (as the public) don't know jack, I'd give the hire a B+/A- grade (and thus I went with the lower option and chose B to make a vote). My A votes would have been a Byrnes PoBO; Breslow as GM situation or hiring Click. I put this in a tier below one of those.