So my theory is he made the decision at some point to end the story on NH, but never changed the manga to reflect that until the end. So he kept all the NS scenes, the love letter dude, Sakura and Minato's dialogue, both Naruto and Sakura saving each other...all that stuff. Then after "The True End," he started really moving towards NH. My guess is that the relationship stuff was going to end with Naruto and Sasuke's near deaths, only to have the rest of the plot be about the two of them fighting together, then fighting each other. Then being saved. And the epilogue would have been the surprise ending of Naruto with Sakura and Sasuke with Karin. (Not NH.)
Ive been reluctant to make a theory on this because there is no way anything can be proven. No on believe anything Kishimoto says and many of the theories presumed some sense of logic and cohension from an author many of us argue or have argued he doesnt possess. I think it could have come much earlier than most, but I dont know and at this point, dont really care. The rational for the ending matters less to me than the fact that he did it.
For what its worth, I do very much agree than he planned to end the manga much sooner than he did. This reason is also part of why Im not sure there is some grand theory behind what he did. Everything after Pain is very seat-of-your pants and there seems to be no plan other than Naruto v. Sasuke at the end. Maybe he really planned his titular character to become rudderless, reactionary, and to have no discernible purpose for several arcs, but I doubt it. So, I guess I do have some theory: he made it up as he went along with no serious plan other than they fight and I gotta set up a sequel.
Totally lost opportunity. Sasuke had his own team, his own love interest. These outsiders who were not quite bad but not quite good. It was the perfect fit. Instead, Sasuke's a loner and a deadbeat dad. It makes his time spent with Taka and bringing them back in the end just pointless.
I disagree. Sasuke even forming his own team made no sense given his motivations. Sasuke forming bonds and reforming via them would have made even less sense given his motivations and drive to complete them. What would Taka have driven him to do....they seemed to possess no independent motiviations or drive to do anything on their own. They just kinda followed him around. Karin chronicled his descent into darkness, but none of them brought anything out or new for his character. I guess they could be wondering hobos? But Sasuke could do that alone.
He also tried to murder one and abandoned the other two and they returned out of some sense of loyalty. I guess. I think Taka never should have been formed and everything surrounding them from a literary standpoint was a complete disaster. They suck and I wish they had never been introduced. And as awful as SS is...SK is the same problem on steroids.
Hey kids, let me tell about the time I left your mom to die on the forest floor.
In fact, their entire reconciliation pisses me off because it such bull crap. He abandoned them and they came back, virtually no questions asked. It wasnt even coincidental or out of revenge for what he did. They sought him out to rejoin and help him without a second thought. Isnt this kind of nonsense one of the core reasons Part 2 Sasuke blows so hard? That no matter what he does no one is willing to say F-you, Im outta here. Carving out a life with them doesnt seem functionally different than benign allowed back with open arms. Its the same basic problem: accountability is for chumps.
Him going on with them only makes sense semblance of sense if the manga decides that he was beyond redemption (as the manga saw it) and/or his crimes meant he could never return. We know from Obito that Naruto unlikely believes that anyone is beyond redemption no matter the crime. That was never going to happen because Naruto would have viewed it as a failure. Sasuke was going to be redeemed and he was going to return eventually.
Id have loved for Naruto to have been forced to actually confront he complexies of his path rather than just waiving him wand and redeeming them, but unless Kishimoto was willing to write or mixed ending (as opposed to the hero obtaining his goals) this would be impossible.
EDIT: As for the father thing, Naruto is unquestionably better for one simple reason: Hes there. My line of work puts in contact with families where Dad takes off or is spending years in prison. Ive definitely gotten the impression thatd they would prefer a poor dad to no dad at all. It would be different if he were abusive, but hes just a workaholic who isnt there enough. I think it beats the tar out of a dad who was AWOL for 12 years. Saradas crisis in gaiden doesnt occur if Sasuke even makes token efforts.
This gets skirted over because Sasuke seems to have a superior relationship with Sarada now that hes back and Boruto still has dad issues, but thats just what we see on paper. They could flap their arms and fly if the author wrote it. So, objectively speaking, I think Naruto is better.
I think is also a consequence of just the terrible portayal Naruto gets. Narutos issues with Boruto are unstandable and relatable....if portrayed well. Its not however, because we know so little about Narutos end of it other than he works and isnt there for reasons that seem really OOC for the guy we saw in the original series. Instead, they both come across as brats and kitten.