I mean, a 2.69 ERA is great, no doubt. But IMO, from what I've watched, he's not an elite level pitcher.
Honestly? It's alot like Richards from seasons past. Is he the best we have? Yes. Would he be one of the better starting pitchers in any rotation? Yes.
But...I don't know. He just doesn't feel like a true ace IMO.
EDIT: To clarify, maybe it'd be better if he had more than an elite breaking ball. It's something that merits thought, no doubt.