Those plays only work is if there's not enough time for the defense to identify, with certainty, who's eligible and who's not, and the Pats knew that, of course. That's the intent behind the play, the way the play is executed, the timing of the substitutions, and the timing of the declaration to the refs, and the timing of the PA announcement. Doesn't that constitute the kind of deception spelled out as a violation of the rules?