Ray Allen did have a bad series defensively, but Joe Johnson is one of the biggest 2 guards in the NBA. He's bigger than Manu or Kobe or Richard Hamilton. Only Turkolu is bigger out of anyone in the playoffs. We also can slide two very physical guys in Pierce or Posey over, and Tony Allen is a very quick, strong athletic defender too. Ray has had some decent moments defensively, particularly against Kobe.
I thought Doc showed his flaws in the series more than anyone. My other concern is that we only have one takeover guy in Pierce, and while he is talented enough to handle the role, he doesn't have the same end of game poise as some of the big guns on the other teams. I'd hate to see us lose the whole thing in the last minute.