Bare with me for a minute as this might be a bit of a wild take, but does the longer XP take it's toll over a period of time on kickers? It somewhat adds a couple "pressure" kicks that they never had to worry about in the previous years of the NFL.
This kicker was apparently hurt, but that doesn't account for all of the other misses this weekend. So much of kicking seems to be in the kickers' heads, so I do think that the fact that extra points are no longer gimmes could very well have made a difference.
best rule change i can remember i also think anything less than 30 should only be worth 2 over 50, 4 pts
That would cause teams to intentionally take delay of game penalties to get a longer field goal opportunity.