I think naruto would've still beat pain. He learned she mode which took out all the pains except one. I think it makes sense that he went 8 tails form, still do didnt defeat him, and figured out the timing of the last pains attacks. And naruto ended it with a classic shadow clone trickery. Pain was tired at the end. And he definitely should've owned Nagato when he got there. I think his real maturity showed a lot when he saw Nagato.
Danzo wasted shusuis eye. That was plot. If he was about business, he would've used it earlier and not when he was about to die. This makes me wonder what was even their point of revealing shisuis eye.
Sasuke defeating not deidara. Plot to the fullest. I swear that was not enough time to summon the snake and get in the mouth that quick.
Kakashi getting both of obitos eyes. They never even explained that.
Sakura not stabbing obitos eye. Who the **** stands there. That pissed me off.
Naruto and sasuke both losing an arm. Kishimoto did that on purpose to make people do what they're doing. And he never even spoke on it.