My problem with that interpretation is it's total non sequitor
during the attack. First, there's shots of nukes arming, then Doral enters the scene and says "This has been a long time coming." That's when Six looks over at one of the Cneturions that entered with him before turning back to Doral and responding. The rest of the dialogue is given to an Eight who doesn't seem to be paying any attention to the Centurions. Plus, the Six says "doing" in the present tense, as in something the Cylons are doing right then. The human Cylons aren't in the process of suppressing the metal Cylons personalities--they're in the middle of killing all humans. Maybe the shots of the Centurions are supposed to clue us in to something, but what you're saying just doesn't make any sense to me.