This take is way over the top. Cook did have a very good game. Yes he should be used more in the passing game. Yes he does have some nice speed.
However, let's not go crazy here. Cook is really just a Jag. You look on almost every team's roster and you can find a guy like him. Teams do not have to game plan for Cook. How many TDs and long runs does he have. Like previously said his blocking is bad. This seems to be the first game where he has broken tackles. He can be shut down pretty easily as the Jaguars showed. In that game he missed assignments and missed holes in his limited role.
Yes he played a good game and looks good. He can be a integral part of the offense. But let's not make it like Cook is an all pro. He's not a 20 touch 3 down back. Those are rare nowadays. He's l just a Jag who will have good and bad games.