It seems the NFL just welcomes controversy. Here we have another blatant missed PI call again benefitting the same team that caused the rule change a couple of years ago. And on top of missing the call they penalize the player for complaining? Ugly ugly ugly. Seattle is basically done anyways, so it's not a huge deal to them, but imagine if this is next week and Minnesota is fighting for their playoff lives? Just a bad look for the NFL (again).
As far as going back to the way they did it for the one season. The last time was a disaster with teams just using the PI challenge strategically, like when they throw an incomplete pass on 4th down late and there was no PI. But at this point even that was better than what we saw in that game tonight. You would think they could have some kind of eye in the sky type system where a team can challenge any penalty or non-penalty twice a game and it can quickly be confirmed by an official watching a replay, no need for the on-field ref to look at a review. Carroll challenges that play tonight it is overturned almost immediately, and in cases it's not you give the team a 15 yard penalty.