Yeah, I agree in part with your points. Any Star trek show should be an ensemble effort, and that’s why, of the newer shows, Lower Decks is much more my bag.
FWIW, I thought the Burnham focus worked in season 1 as our POV into the war setting and previously unseen Trek periode. We got to know the crew through her as she worked her way back into Starfleet. But yeah, past that the “it’s all about Michael” approach became a detriment to the show. There was literally a whole crew to explore like they did, only somewhat, with Saru.
With Picard, I expected the new crew of La Sirena to crystallise around the main character and become a new constellation — but no. Season 2 turned into a strange Gothic exploration of Picard’s past, and one that actually contradicted what we know about the character. If Chabon hadn’t left the writer’s room, I think we would have seen a more compelling story.
I did enjoy parts of the final PIC season, but it felt like it was written by somebody who didn’t really get what TNG was about. The old crew felt two-dimensional, like clichés of themselves, showing up for a cameo and dropping a quip. But I’m already veering way off from the Disco focus of my post 🙂