The only thing I didn't like about that episode is that, after Crusaders of the Lost Mark, I watched The one where Pinkie Pie knows and it was the exact opposite thing. I think that CMC episode should have been the standard level.
Even though I stopped watching the show many months ago, I'm very glad that the writers made this episode the way it is. It kinda reminds me of Inside Out and Undertale in the sense that it takes an idea and it does everything great that you can do with it. It's clever, it's new, it's refreshing, it's wonderful and it's everything you need for a great episode.
Maybe this episode is one of the reasons why I have good feelings with the upcoming MLP film. It's not about Equestria Girls, it's not made with Flash, it's about the six main characters we all know and love, it has new villains, new characters and interesting creatures and it's an adventure. We have to wait until it comes out. Until then, I have this episode and many others. :)