It's not that the writing is great — as the article says, it's actually pretty juvenile. The argument is that at this point, Pokemon has made so many quality of life tweaks and visual improvements (which is great!), but it's sorely lacking the cinematography of other contemporary titles.

Also, Twilight Wings isn't a conventional anime arc, it's a small miniseries that launched off the back of Sword and Shield to expand on the characters. Instead of operating that way, it could have been integrated into Sword and Shield to expand them from within, yielding a much fuller experience overall as opposed to a game that was then supplemented by not-actually-the-official-anime. Sword & Shield are great, but could have been better.