I'd rather the story continue as long as the writer needs it to end it as good as he feels like it because it's his manga. At times it doesn't feel like Kishimoto is writing the story rather an outside force and everyone wants it to be in their favor. It sounds like you don't like how the manga is heading now, I like where it's going but chapters before that were dragging on. So you want it to end, that sounds like you don't like the manga at all.
I'm against any "fanfiction" as I call it, where people write their versions of the plot, some AU's and so on, and then they insist that if Kishi made it like that, the manga would become much better. Because I'm pretty sure it wouldn't. That's why I'm not going to say what would I change for the manga to be more to my liking and so on, but you are correct - I dislike some directions the plot is heading to now. I like it in general, after all, I read the manga for almost 9 years now, so I kind of grew up with it... But for me it's not the same old Naruto as it was before. I liked it till the point of Juubito's defeat, and to be honest, I'd like it to end at that point. Every chapter since that point was only disappointing me. I'm very affraid that Kishi will do more and more chapters just for money and nothing else, which, as we all know, never leads to any good. That's why I want it to end as soon as possible. I don't it to become mediocre. Good things shouldn't last forever.