Really? So the fact that the refs have problems with the legislation of calls, have problems getting calls right, and have problems with getting the calls done and the drives continued is not a problem? I have no doubt that the game would have turned out differently if the normal refs had been here. Seattle would have legitimately won, rather than having to rely on a botched call. There is no doubt, that final catch should have been ruled an interception. But it wasn't. There should have been holding called in Green Bay's TD drive that would have prevented it (assuming they kick instead of going for it on 4th), but it wasn't. There should have been offensive pass interference on the Seattle TD that was called defensive pass interference. There are calls throughout this season that have been made flat out wrong, and normally, the calls are just wrong "because my opinion says so". In the SNF game, there was a call against Baltimore for illegal contact down field, when it should have been holding (contact happened within 5 yards, so legal, but was holding, so illegal), and then they didn't call holding later on when a Baltimore guy brought Gronkowski to the ground, preventing him from continuing on his route.
As for flow of the game: flow is very important in football. The sport is less about trowing and tackling and kicking than it is about strategy, and mental fortitude is important. If you give the defense a 5 minute break to sort out the last play, you ruin the no-huddle offense that the offense has been building up. It could easily cost them a TD.