i agree with everything except the naruto caster thing. It was itachi who programmed the eye. Naruto didn't even intend to use KA against edo itachi but since itachi programmed it so, it worked. And yes, it is questionable if it would have worked against sasuke. And it is left rather abstract. I mean itachi knew right away that KA was casted on him and he was freed from kabuto's control. When its said that one under its influence doesn't know it. Still kabuto's jutsu was expelled as well. Convenient wasn't it.The problem is KA was never FULLY explained so for all we know once the caster died KA would wear off.
For example Technically if Naruto and Sasuke fought and KA Crow activated doesn't that mean Naruto is technically the caster? We dont even know if it would have actually worked on Sasuke.
More than likely I think it happened like this:
Once Itachi died KA wears off AND Tobi feels relieved and lowers his guard to go for Sasuke.
Tobi would go for Sasuke
Sasuke Amaterasu Tobi
IF that fails (Which it did)
Itachi knew Sasuke would want his eyes.
Once he got his eyes
KA Crow would affect Sasuke once he fought Naruto.
LOTS of contingency involved which is quite Genius of Itachi. However Itachi's excessive planning was part of the reason Tobi/Obito was also so well guarded and prepared. In essence Itachi helped keep Tobi/Obito on his toes to sharpen his own mental skill
Couple theories I have for that isi agree with everything except the naruto caster thing. It was itachi who programmed the eye. Naruto didn't even intend to use KA against edo itachi but since itachi programmed it so, it worked. And yes, it is questionable if it would have worked against sasuke. And it is left rather abstract. I mean itachi knew right away that KA was casted on him and he was freed from kabuto's control. When its said that one under its influence doesn't know it. Still kabuto's jutsu was expelled as well. Convenient wasn't it.
Why not use it on tobi or pain to make them kill all other akatsuki and lead the world towards peace. Its complicated jutsu i guess.