But sometimes it's pretty easy to judge an episode from the sypnosis, like for example this episode. Exact details aside, everyone seemed to know the Mane 3 would act oddly OOC and fuck up everything and the CMC wpuldn't say anything until the end. And I think the same can be said about this.
Now I know what you're saying, most people thought Applejack's Day Off wpuld be completely different than what it was, but that being said, I still think this zombie pony episode is a case where it definitely is what people are predicting, something in the same vein as Mare Do Well.
As for the baseball one, I'm not as confident in my belief for that, it's just more of a fear. I hope it's just more of a Pinkie and Fluttershy episode too though.