As of today, Interdimensional Cable 2 is still the "weakest" episode of the series - if you can call a rating of 7,9 "weak", that is. And I'm glad they turned this formula inside out, and made a very good take on their "series of independent mini-episodes" episode. Bars in the last 3 episodes were put really high, and even though MMB lags a bit behind, I really liked this one. Here's why.
1.) They don't afraid to confess and face their failures. "Yes, we're doing it instead of Interdimensional cable". A nice breaking of the 4th wall, while preparing you for something else.
2.) Blue storage, red storage, purple storage. Proves time to time, that Morty's family is messed up beyond all recovery. They've got a bit less emphasis than in S1 and S2, but they got just the right amount in this episode. Even Jerry.
3.) A Rick who cares. How many times did Rick say that there are infinite realities? Were he not so caring about HIS Morty, he could get another one from another dimension with ease, once the previous Morty gone insane. He even acknowledged in Pickle Rick that he left his daughter behind in an alternate universe, and the the nature of multiverse is against any form of emotional attachment. Yet, he wipes Morty's memory, once something traumatizes him to preserve his sanity. The opening period reveals more about the relationship of these two than the entire Worldender episode.
4.) Summer, the hero they need, but not the one they deserve. Remember Rickmancing the Stone? How they tried to shovel down on our throat Summer as a main character? Well, here she gets only a minor part, but we see how important she is, not only for his grandpa and Morty, but for the very survival of both of them. Writing done right.