What if team X kicks a field goal, and team B gets the ball and doesn't score?
Team A wins.
I like the move. How things work now, the winner of the toss is essentially the winner of the game. This levels the playing field just a bit so as not to favor the toss winner too much.
I believe the team that wins the coin toss is winner only 52% of the time since 1973. In 1994 they moved the kickoff back 5 yards and since then the team winning the coin toss wins the game around 60% of the time. I don't have a link, just going off of memory here; perhaps a smarter person or someone with more time on their hands could verify this.
I would be more in favor of modified college rules. This solution they have come up with is a compromise between NFL and college rules, but IMO falls short off the ideal.
My idea is to mimick the college rules by giving each team a crack at scoring, but move the starting ball location back to the 50 yard line (since NFL field goal kickers are far more accurate). After the first round, you have to go for a touchdown if the game is still tied. Two point conversions would be allowed in the first two rounds, then mandatory in the third round (if necessary).