I would've told him to have more sage backstory, have Sasuke and Co help fight the statue/swirl zetsu, DSM kabuto + jugo come as reinforcements for guy after he falls, Jugo dies and merges w Sasuke, Madara killing more people, not bring back kaguya until maybe after a way more epic battle w madara, and have Sasuke go a different route on his revolution I just don't like how it's about killing upper powers. Give naruto wood style vs Sasuke, and have naruto and Sasuke both use their secret Justus/not forget about them. What else? Uhhh I would've given Sasuke the same powers he has but with two eyes I find it weird he has only one 6T rinnegan. 1 more Kirin from Sasuke by the end of the show
I would also point out that he went from the sage dualing the ten tails and sealing it in him and sending the core to the moon, to him and his brother fighting and sealing kaguya in the moon. It's just so inconsistent I don't understand how he was the Juubi jinchuirki if he sealed away his mother but showed him fighting the ten tails Idk how to explain it but it's inconsistent when u think aboutnit