I know what you mean, Tricks, especially since Kishi seemed to only care about the money and not much else if he couldn't do stuff with the characters you mentioned. Especially too when you think aboiut his willy-nilly nature to kill some characters just for "development" and yet failing on it, since when he killed Asuma to develop Shikamaru, all Shikamaru did was try to replace Asuma out of his self-perceived guilt of failing to stop Hidan, even if there was no chance in Hell he could have, or with killing Neji to develop NaruHina, since that failed SO hard since she was just forgotten and did her usual "I won't believe in Naruto" crap when he was dying.
You know, up till the end of the Pain arc, he had some really meaningful character development, and really painful weighty deaths: Azuma and Jiraiya, but also Zabuza and Haku, the 'hero'/stepdad of the kid from that same Wave arc, Sasuke's family, Dan's death scene, and Kakashi's almost-death. Kishimoto wrote tragedy and heroism equally well.
But I think he backed off of it after the Pain arc. I wonder if he wished he hadn't killed everyone off. Or if he hadn't written the death scenes so realistically (or with so much weight). Because he was so light with the death scenes after that.
After Pain, every single person was redeemed somehow before he died. Or at least shown to be a justification for their death. There weren't any more senseless tragedies or heart-wrenching, character-developing losses of mentors/loved ones. There were supposed to be lots of deaths on the battlefields, but none of them were known people.
The only death that comes close was Neji, but come on! In the next page it's blatantly shown to be a pedestal to showcase Hinata, with her gross speech. His death doesn't carry the same weight as Asuma or Jiraiya.
Anyway, sometimes I wonder if Kishimoto didn't regret killing off some of those anchoring characters, in light of the fact that the manga kept going another 7 or 8 years, you know?
I think i said this before but I think kishi went with nH with extreme reluctance. Even the pro hinata fans working on the last knew this pairing was a difficult sell and they would have to start from zero and go to a hundred. The reasons he did it was. He was tired of Naruto especially after years of arguing with his increasingly nH favoring staff about who was the heroine. As well as being convinced by his increasingly pro nH staff that the fans wanted hinata to get what she wanted. So to give the fans what they apparently wanted for years and in order to get his staff to stop fighting him he agreed to nh very close to the end. The fan letters he received early on convinced him that it was the right decision at first. Then the backlash hits, the flop of the last, and everything else. He learned that what his staff was trying to shove down his throat for years was wrong, and he has help destroy his series and increasingly his reputation.
I think Kishimoto just gave up. Because no one character got a satisfactory ending. Not even Hinata and Sasuke. I think Kishi was just done with the whole thing and wanted to move on. There are some scenes that feel like the Kishi of old, and then there are some things that are so disjointed and broken — so out-of-sync with the rest of the story — it's like Kishi just didn't care. He wrote what he wanted, till someone came in and told him to insert and image or a speech or a storyline (like hinata's). Then he did, and went back to writing what he was doing before (NS). He just didn't care. Slap on the NH ending, and it's done.
No matter what the fans and editor's pushed, it was Kishimoto who ultimately gave up on his story.