So a trash episode to end what has been a hugely underwhelming arc. Firstly, Solgaleo has got to be the biggest waste of a legendary seen in the anime, with its role basically being a magic bus for the kids. Even it's 'farewell' was done in a minute towards the end, and that was hilariously the title of this episode.
Of course, Rowlet is the butt of jokes as usual. And what I didn't want as the focus was exactly what happened, Kukui marrying Burnet, and they've not even known each other long. It was the whole focus of this episode.
Also, simply saying sorry is enough for Faba, and Lusamine is somehow absolutely fine after that whole Mother Beast episode. Also, I recall that AF have another member, Wicke. Did she even appear in the anime ("/s").
Only the last 3 minutes had any use, since we learn Ash and co are part of some Ultra Guardian team, and we see Poipole. I believe we'll see Necrozma and the other UB's fairly soon, probably within the next 6-10 episodes.
As for this episode, I give it a 5/10. Pointless stuff really, and like typical SM, almost 80% of the episode is meaningless and dull, with only the last few minutes having some importance.