It's really irrelevant because his foot slipped. Of course it's going to be a horrible kick. Any time that happens, and it happens quite a bit over the course of a season in the NFL, the kick is going to look like that.
I don't know how they compare. All I know is that players during the game were slipping all over the place and it had rained heavily prior to the game and for several days prior so the field was wet.
He has been fine this year. Has made all the kicks he hasn't slipped on, that's really all you can ask for.
I'm much more upset about his kick out of bounds than I am about a misswd FG when he slipped. It's a one off play, nothing to really see there, unless it starts happening every other kick or something.