Applejack's family. It made perfect sense that the story was kept a secret, it was hurtful for the parties involved, and a mystery for Applejack and her siblings.>Great tier
Dash's parents. It's clearly addressed that Dash loves her parents, but she specifically wanted to keep them away.>Good tier
Shining and Cadance. Twi didn't have to mention her baby sitter. It is weird that she didn't mention her brother, but at least it was in season 2, her friends still didn't have to know anything about him by then.>Garbage tier
Maud. Literal retcon, it is assumed that what we see in TCMC is what Pinkie tells about her family, and Maud wasn't there. Conveniently she has a sister out of nowhere who happens to be her favorite sister. Even though it's a role that any of the other two sisters could have played since they had no development at all yet. Stupid as fuck.
Fluttershy's family. It would have worked many years ago, or if Fluttershy was ashamed of her family or at the very least of her brother and had kept him a secret. However, unlike Shining, a character no one else knew anything about and we can relate to the Mane 6, the episode fucking starts showing that Dash knows about Fluttershy's family. It's not "this guy I never mentioned is my brother", it's "for some reason everyone knows about this guy who never appeared in six fucking seasons". Having this so late was a completely retarded reveal.>Dumpster fire tier
Scootaloo's family. Ignores fucking everything about Scootaloo we've ever seen. Who was taking care of Scootaloo during Flight to the Finish, or during The Washouts? If Scootaloo loves her parents so much, who was she talking about during her speech to Dash in Parental Glideance? For that matter, why the actual fuck somepony else's parents were the only ponies to support her when she needed someone by her side? Not to make her an orphan, they give her two "loving" families who never gave a fuck about her. Shit.