As always its the defenders job to make sure he does not risk the punters safety. Unless he blocks the punt he has no business rolling into the punters leg at the most dangerous point, and that has always been a clear roughing Penalty. But I would check this one also under the SB-Special "let them play" rule. and I would be very surprised if we hadn't had our share of No-calls under this rule too.
Yeah the Pats had the talent in Brady and the receivers to play Seattle. not sure how many other teams could do that to them, but you have to admire and be slightly alarmed at a defense that doesn't adjust. Just makes me appreciate the coaches and smart players we have on defense.
Over in Football Outsiders People are wondering, why other teams do this too, but its actually incredibly hard to do.
Pats have 4-5 competent receivers on the field most of the time, none of which can reach Moss-type separation, but all of which are sure-handed good route runners. This means against any Secondary in the world, somebody is going to have a mismatch (Our there are easy running gains), as long as pressure is not obscenely high (Good O-Line). So far everybody could do this.
But now comes the hard part. Each snap its going to be somebody different, depending on various decisions of the Off and Def. And you got presnap + 2 secs to correctly identify the open throw, and deliver a sharp throw, and you have to do this 8 out of 10 times each drive. This part is incredibly hard to achieve, and I am not sure if even Manning/ Rodgers can do it consistently. This is why most teams don't copy Pats gameplans and also why TB12 is the GOAT.