The Pats are not doing anything anyone hasn't seen in the NFL.
Because they use basic personnel sets 12, 21, 22 the other team is wasting a whole lot of time with substituitions while NE goes hurry-up. The rules only allow for time given to the other team to sub-in if the offense subs players.
In the example of the goal line play, the Texans were busy trying to get their goal line package in and the Patriots kept the same personnel in from the last play and went hurry up to snap the ball.
It's a great way to score easy points but it takes a lot of good execution from the players to do this.
"It's little bit like the description of pornography from years back. It's hard to define it. But you know what it is at the end of it. It's hard to define it. I think you know who is more physical. Often times you see that in the fourth quarter. A lot of time the team on the other side feels it. We pride ourselves on being a physical football team. It's important to us. It's an important time of the year to lay that foundation." - Coach Garrett