I didn't watch Shippuden until way later in my life, and to be honest I was kind of disappointed by it.
I recall my peers constantly praising it as being "so much better" than Naruto, but I just don't see it. It's also not what I thought it would be like.
Shippuden ended up being a lot more like Dragonball Z and less about ninja wars in between the villages.
I would've liked to see more blood and weapons, broken bones, and fewer energy blasts.
It's kind of ironic, because a lot of what I expected Shippuden to be like was explored in the Obito flashbacks. It's ironic because while that's what I expected and would've liked to see more of, I almost feel like it was too bleak and 'colorless' to be a high-point of the series.
I dunno, there's also something about seeing kids fighting that adds an extra layer of significance to whatever is going on.
I like to imagine in such a scenario, Sasuke would-
Unlock a 3rd level of the curse mark, equivalent to the Naruto SM
What if he activates the Susanoo after entering CM form? I think the Susanoo would have wings similar to the wings in CM form. Also, the Susanoo would be infused with sage Chakra at all times. That would be super OP.
What if he fuses these modes? Like, Susanoo and CM would activate simultaneously? How cool would THAT look?