Yeah, not knocking Caviezel, he's doing what he can. But he's also saddled with a very indistinct role; he's doing well enough with what he has, but I'm not entirely sure just what their vision of this No. 6 is.
In the original, no matter what mental/physical tortures he was put through McGoohan had a definable tough inner core of outrage that sustained him, and centered the show on a higher morality than just cold war paranoia thriller. This Six is reacting to some horrible and unimaginable treatment -- in the last one up to the verge of breaking, in good Prisoner tradition -- but we don't know who he is (and I don't mean his job or why he resigned) or what he's holding onto. He's more baffled than pissed off. Which makes him an Everyman and a cipher almost as much as No. 2. But, this was just the first two hours, so I'm hoping there's more meat to 6 in the shows to come.
Also, it's curious that it seems the entire run is going to maintain the brainwashing/mind game that No. 2's been preaching ("You're insane, the Village has always been here and there's never been anywhere else") as the means to crack No. 6. Which makes sense if it's just to be 6-hour run and not a long-running series. But that's going to make it practically impossible for No. 2 to ever ask, "Why did you resign?" As soon as he does, the gambit is forfeited. Very curious to see how they play this out.