Looking back in retrospect this episode has a ton great parts going for it. The point of the episode is the Rick and Morty are stuck on a metaphorical train that figuratively explains the writing style of Dan and Justin throughout the entire episode. The train represents the stages that Dan takes to write and episode of Rick and Morty explores many different aspects such as "do's and don'ts", canon and non-canon timelines, fan appeal and a ton more. And they do a creative job of putting the episode together, almost as they would go about actually writing an episode (hence the layers of meta in this episode.) When you start to look back at how the episode is put together, you start to get a better understanding of what Dan and Justin were doing with this episode and the type of meta thinking. However the big problem with this is now this episode can almost only be enjoyed by those who are dedicated fans and understand Dan and Justin's style of writing. A person who occasional watches this show would see this episode and most likely have a very hard time understanding what is happening the episode and find it even harder to find any of the humor sprinkled in throughout the episode appealing. When an episode starts to get too complexed like this, it starts to take away the accessibility from new or common fans who just want to watch the show. I personal love this episode but can only give it a 7 as it is an episode that requires you to understand the creators of this show to actually appreciate it.