The long-awaited return of South Park sort of blinded me from the decentness of the episode. I was excited the series returned, but this episode was more of a warmup for the season, which as a whole, was way better than the previous two seasons.
There were a few missed opportunities, such as the Santa reveal. Instead, the episode gave more attention to jokes that seemed rehashed too often.
However, the episode did a good job representing Butters' ignorance yet again. Matt and Trey just needed to find a more satisfying way to end the episode.