Your argument makes sense but there are two big portions to the plot at any single time since Mid-Part 1. For almost all of it, it has been, Sasuke has run away and is getting stronger, Naruto must bring him back and get stronger. Now it is Naruto is fighting Juubi, Madara and Obito and Sasuke is talking to Hashirama, Tobirama etc.I don't think so...
Yes, Sasuke is important, but he isn't as important as Naruto. His purpose is to push Naruto's character further and help him grow. Everything Sasuke does or any story progression Sasuke gets, is to help Naruto's character.
Everything he does is connected to Naruto somehow...
EDIT: Naruto's character can still progess without Sasuke. There are many other characters that helped Naruto's character in some way.
So the title must sasuke and not naruto......if sasuke more important, this is easy thinking why can't you thingking like normal ppl........???just like the title says
have you seen a manga where the main character says he's going to kill himself because a side character won't return to the village?So the title must sasuke and not naruto......if sasuke more important, this is easy thinking why can't you thingking like normal ppl........???