First, I do reject the idea that Pacquiao was dominant in their fight, even if some people act like it's a crazy notion. Pacquiao did *not* land that often against Bradley, regardless of what compubox says. And Bradley had two injured feet, which often seems to be forgotten or ignored.
The only guy who has landed against Bradley consistently was Prov, and that's because in that fight, Bradley *deliberately* chose to abandon the skills that make him elite--ring IQ and elusiveness. That he beat Marquez more decisively than anyone sans Mayweather is only confirmation of his status IMO.
It's not that Bradley has done nothing but win--or his persona--that makes him elite. Danny Garcia is not elite IMO, and he has those qualities too. It's that Bradley has insane, almost unparalleled reflexes and is harder to hit cleanly than almost any other fighter alive--when he chooses to be. And he is an extremely smart fighter--when he chooses to be.
To me, the reason he's not considered elite seems to be that the skills that make him elite are subtle and not eye-catching. That's probably why he was never considered a prospect in the first place--he didn't blow people out of the water with speed like Gary Russell or Jesse Magdaleno, and he definitely didn't flatten people like Wilder or Golovkin. He just landed his punches and slipped those of his opponent. And he still does, better than almost anybody on earth--when he chooses to. That's it.