Of the three, expanding the playoffs from 12 to 14 will likely pass. From what I've been hearing, even though people are upset with the Dez Bryant no catch, reversing the rule is going to create more problems than what it's worth.
The pass interference replay is going to slow the game down and is going to result in more pass interference calls because the refs can rely on the replay as a crutch. And I doubt the league wants refs to be hesitant in making their calls.
The expansion from 12 to 14 is all about money. And the league likes more money. But, from my calculation, that would mean you'll have seven teams make the playoffs in each division. That means you'll have the 6th and 7th seed playing a wild-wild card week, and then the 1st and 2nd seeds would have a two-week bye before they start play. Would a two-week bye be advantageous? Are my calculations off?