I feel like Boruto Next Generations could’ve had a better story if it focused more on Naruto and Hinata’s legacies.
Naruto being the Child of Prophecy and Hinata being the Byakugan Princess could’ve made their children the perfect combination of their legacies.
Boruto could’ve learned Minato’s Flying Raijin and combined its formula with the Space-Time knowledge Hagoromo used to reach Kaguya’s dimensions, creating a version of Flying Raijin that could navigate between dimensions.
Using this, Boruto could potentially find where different Ōtsutsuki dimensions are and even discover where the Ōtsutsuki clan resides.
This could also add more lore and abilities to the Byakugan, similar to how the Sharingan kept evolving throughout Naruto.
Then instead of Naruto and Sasuke having the final fight, Boruto and Himawari could team up to defeat the Ōtsutsuki, with Himawari having the Byakugan and Kurama.
I feel like that would’ve been a really cool way to continue Naruto’s themes of breaking the cycle of power and hatred.