So here's the thing.
I don't take issue with creators trying something new. It's usually better to take a risk and see how it pans out, rather than keeping things stale.
Problem is, while Starlight is new, she's also kind of not. She's a retreading of Twilight's growth and development throughout the first three seasons, except this time, it's done in such a haphazard manner.
Simply put, the show is far too big to accommodate for a new main character. I'm not saying it can't be done, but the way it looks like, the writers really want to push Starlight as one of the new 'mane' characters, but with her own set of friends as well.
Back in the early seasons of the show, episodes focused on Twilight, her five friends, and occasionally the CMC. That was pretty much it, for the most part. These days, it's Twilight, her five friends, the CMC, a host of side characters like Maud, and now Starlight, who comes with her own friends like Twilight has. Simply put, it's way too much at this point.
Continued in next post because character limits or some shit: