G5 too early
-Sunny being an alicorn
-Earth pony magic becoming explicit
-Sparky
How do we know they’re “too early”, though? If they’re going to be important plot elements, then it makes sense to set them up early. Keep in mind that the movie was already eight months ago.
I think TYT is the key ingredient that G4 was missing: downtime. A New Generation sets up that something big went down in the past, and then ends with a massive change. TYT gives the setting a chance to breathe, and lets the characters just exist in this transitional period while they process the changes. Then we get a special that introduces some more important elements. Then we’ll get some more downtime to process those changes. Then, when the show proper starts, the audience will already know all the important setting and character details, so it can just hit the ground running instead of having to devote time to explaining things.