The flaw with that scenario is if the team that scores the field goal first,if they get the ball back after the other team fails to score,if they score again,even by another field goal,then they win? Or how about if the first team to score a field goal,rides out the OT period without anybody scoring again,do they win the game,or do they keep playing OT period after OT period(even though the one team is technically ahead by 3 points) until someone sores again? No matter how you look at it or try to explain it,the new rules are a joke & the NFL needs to get over their superiority complex & adopt simpler,fairer OT rules like the CFL or college.
It's pretty simple... both teams get a possession, but if the first gets a TD it's game over. If it's a tie after 2 possessions regardless of what happens (no score x2, 2x FGs), then it's sudden death. In the playoffs there's no tie so you would have another OT period if time expires with the same rules.