Okay! After seeing the season premiere, here are my thoughts:
I no longer hate Starlight Glimmer with as much fervor as I did for the season 5 closer, and I found the reason: In this episode, she struggles and suffers. Now before you all cry out "sadist!" let me clarify. In all of Starlight's previous appearances she appeared (to me at least) to be too over-powered and I never saw her in a real struggle. But in this episode, we see her struggle in an attempt to be good. Most of her suffering comes as a direct result of Twilight's Friendship lesson and attempting to reconnect with Sunburst. What's more, she's extremely socially awkward, something that I can relate to.
I really liked being able to see Shining Armor and Cadence as parents, and the new baby was fun. It was also great to see Celestia and Luna actually help in trying to resolve the episode's issue.
Here comes the only thing I didn't like about the Season Premiere. The fact that Celestia and Luna confessed to not being born as Alicorns, something that surprised me and a lot of the Brony Fandom. Or at least: "The Birth of an Alicorn is something Equestria has never seen." Soooo, Luna and Celestia were born before Equestria maybe? I'm grasping at straws here to keep my headcanon, but it's not working. Everything else in the two episodes was good.
Also, hooooo boy that THING in the background of the final few seconds.
Changelings are coming for that baby. Either to steal the love it has for it's parents, or vice versa. I expect it to be a major plotpoint in the season 6 closer or the FIM Movie.