This definitely did not come across as meaningless fluff. This meant something, and it was powerful.Even though Fluttershy's choice was wrong, it wasn't all bad. Each of the foals was an individual and you could tell through it all. Their pain, their personal shadow, each of it added a piece of heart-warming/tear jerker to this arc.
The decision to have Screwball spend time with her husband was a great one - it was sweet and sad and amazing. And Celestia's lullaby was a good choice - I like all the songs you put in their.
My only curiosity now is Discord - he's bound to be coming and with how dark his mechanizations were in this series, I can't help but wonder what he'll be like.