The NFL and NHL both have different rules for their playoffs. The overtime rules are different and the policing of games (in NHL) is very different.
Luck plays too big a factor in the Chase now. And, since they use regular season rules, there is nothing on the books to ensure a proper postseason race.
It was BS what they did to Matt Kenseth last year when he wrecked Joey Logano. They should have just made a new rule moving forward instead of suspending him under a new rule. That'd be like arresting someone who hasn't committed a crime, writing a new law to criminalize what they did and then throwing them in jail.
However, a rule should be in place to ensure that Chase drivers don't get taken out by non-Chase drivers. In fact, I think that, if that happens again, the race should be red flagged long enough for the Chaser who got dumped to unload their backup car. And if a Chase driver intentionally takes out another Chase driver, park them.
Imagine if Kevin Harvick and Martin Truex, Jr. were battling for the lead at Homestead and Tony Stewart took Truex out while being lapped.
Also, Chase races should have to go their full distance. MLB has a rule that states that postseason games cannot be shortened by rain, even though regular season games can be. If a race starts and it starts raining, either wait it out or finish it on Monday.
NFL rules allow for regular season games to end in ties, but playoff games cannot end in a tie. They keep playing until someone scores. NASCAR's version of Overtime should be similar. No "Overtime Line". If the caution comes out on the white flag lap of a Chase race, rerack them and do it again. And keep doing it until the race finishes under the checkered flag.
Oh, and NO RESTRICTOR PLATE RACES IN THE CHASE. Why the **** Talladega is there is beyond me, especially since that race is usually a crashfest.