I have been an avid Naruto fan since I first saw the Neji vs. Naruto fight back in Part I and watched ever since then. While I never really agreed with your "Tobidara" theory, I do agree that this was one of the most rushed manga endings I have read (and I have read a few that I thought were "eh"). Here's why I think it was just doomed to end in a bad note:
1. After the Pain arc Kishi seemed to forget a lot of the rules he put in place in Part I and anything leading up to the defeat of Pain. After that it seemed like he let all consistencies and all fluidity of the manga go out the door. For example, no where did he correctly foreshadow Minato being able to go into Sage Mode, but welp, he did it anyways. I think this is where the manga started hitting a bad note when Kishi storyline seemed to contradict what he mentioned in previous chapters.
2. The War Arc was dragged on WAY too long and in my opinion, should not have had THREE different villains to kill (yes, I count Obito as a villain as well even though he was TNJ'd). Had it ended with Madara it may have saved us at least 20 chapters and we may have gotten a better send off then a freak time skip, which in my opinion, was horrible. Kishi really dug himself deep into a whole and had to rush WAY too much in order to complete the deadline he had set, which in turn, made him put out some rather bizarre and crappy chapters.
3. Finally, the time-skip in 700 was unnecessary in my opinion. It's like he didn't put any thought into who should be with who (besides maybe NaruHina and ShikoTemari) and it sort of ruined it.
All in all it was bad timing and management on Kishi's part. I give the guy credit for the 15 years he's put into creating this series, but its like the closer he got to the end, the lazier he got. I know he wanted the manga to end, but he could have still taken the time and care he did in say the first 100 chapters, then screw it up by trying to finish it on a deadline.
Oh well, here's to 15 years off my life spent on Naruto. Thank you Kishi
