I honestly don't see what the big problem with Sakura contributing this chapter. Naruto and Sasuke vs. Kaguya was going nowhere, so before Kaguya could try to escape again, Sakura intervened. I get that people want more from Sakura than just a punch, cause I do too, but this is Kishi were talking about.He's given all the characters a set number of abilities and only enhances them, instead of giving them something new, for the most part. I'm glad that even though all signs pointed to Sakura sitting out of the Kaguya fight, especially after she used up nearly all of her chakra, I was proven wrong by this chapter.
Yes, Sakura might not do anything next chapter, though I really hope she does, Kishi has been getting somewhat better with her being involved. She first healed he SA, then a couple chapters later, kept Naruto alive, then saved Obito from an acid dimension, while rescuing Sasuke, then we come to this chapter of her hitting the strongest person in the Narutoverse. Kishi has not made up for his poor treatment of Sakura, however he has gotten better. If by only a little bit.