Without Sasuke, Naruto would be a series about the main character it's named after, and his history and struggles in life. The Uchiha clan wouldn't be responsible for everything in the entire universe and then some, and side characters would be able to be fleshed out more, due to Sasuke not hogging all of the screen time.
Also, the series being over wouldn't necessarily be a bad thing. If you ask me, ten years is more than long enough. The only reason Naruto is still going is due to the fact that it bleeds money.
I know this is a page back but this is just crazy to see it that way. What do you think Sasuke is? Sasuke is his history and stuggles in life. This story is all about "the king" of Konoha the unborn children taking over in the elders place and overcoming obstacles the elders could not. Without Sasuke the story is not the same. Just like without Sakura it would not be the same. Believe me I don't want to see all Sasuke and no Naruto but I want to see why things are the way they are in this story and without following Sasuke to we will never know.
-Sasuke is to Naruto as Orochimaru was to Jiraiya he has to save Sasuke because Orochimaru could not.
-Sasuke is the Uchiha and Naruto the Senju. "One brother believed Power ruled all" "One brother believed love ruled all"
-Tsunade cared for Jiraiya but could not come to admit it so he died and she felt bad will the same happen to Sakura?
-Naruto has to become Hokage because his father was.
-Naruto has to make peace because Jiraiya could not. He took a large step in this becoming friends with Gaara as he was the same to his village like Naruto was to his.
There are an Insane amount of things that tie together in this story that I simply do not have the time to list.
Also Naruto only goes on because it bleeds money? That's backwards also. You know why it bleeds money? Because people BUY it they want to finish the story and find out what happens at the end. Your making it sound as if people are attempting to keep a company in business.