I understand where you're coming from, and I'm sure others have a similar opinion, but I have a slightly different take.
Matta is one of those coaches from a very good/top program with about as many varying opinions as you might find. JMHO, but I think he is a better tactician than many give him credit for. This might be splitting hairs I suppose, and some of his in-game adjustments may not be the best, but he did very well with Butler and Xavier before Ohio State, and that wasn't because of better talent. He had a really good run in the 2004 NCAA tournament with a 7th seeded Xavier squad, schooling some higher seeded teams along the way.....and almost knocking off Duke in the Regional Final.
He's certainly recruited quite well with Ohio State, and that may be his best skill, but I disagree that it's just simply role the ball out there. Yes, his best teams have had the right mix of top-rated players and experienced players (like Diebler and Lighty and then Craft).....but they've been more consistent over a number of years to just survive on talent alone. I will say, though, if his game-plan isn't working, he does have some limitations. So, maybe, I'm disagreeing with more your second sentence. In my view, there's more to "coaching" outside of recruiting than just in-game management and adjustments.