NFL bans leading with the crown of the helmet outside the tackle box. This will not end well.
Look, I love football. I know that this game is played at a very fast pace. This measure, in my opinion, will do nothing.
You want to lower cranial injury in the NFL in the long term? Get rid of the current pads. Replace them with what rugby players can wear. Or go back to the rules where in order for the play to end, the tackler has to take the person to the ground. Both rules discourage tacklers from launching at the ball carrier.
Just my $0.25
Also noted that they are ending the tuck rule. Only took 13 years after one team's postseason was ended wrongly.
Next thing you know they'll overturn the Electoral College.