They have Brady and Gronk and bunch of JAGS, and they are constantly changing players on both lines, at WR, RB, and throughout the D. Yet year in and year out they don't make mistakes, don't get many penalties, play good special teams, and play fundamentally sound. They hit their assignments no matter who is out there.
Odell Shep & Engram running free crossers all day
Same with the great William Stephen Belichick.