What more do you what? that's exactly what happened.
Surf and turf: episode about the CMC dealing with how Seaponies and hippogryphs live apart from each other (the ones that want to be seaponies stay under water, the others live on the mountain) and a hippogryph boy who feels torn between his seapony mom and hippogryph dad.
mean six: Chrysalis returns and clones the mane six and is UTTERLY INCOMPETENT. Mane six never even run into her or realize she's doing anything because her plan self defeats and the tree of harmony melts the clones.
Molt down: Spike gets puberty. that's pretty much it. Also his bad BO attracts a roc that eats dragons because they stink so bad it can track them. It grabs rarity and zecora, he molts and gets wings, and then super saiyains it.
Sunburst/starlight parents episode: Sunburst and starlight are called by the map to make up with their parents.
non-compete clause: AJ and RD as teachers for the friendship school fuck everything up.
Celestia school play: twilight uses celestia in her play since it was a dream of hers 1000 years ago. She's horrible.
Hearts and hooves day: Discord, big mac and Spike episode, BM thinks sugar belle wants to break up with him.
End of FIM movie in 2019, G5 movie in 2020.