um.... sasori obviously has emotions and that cylinder of flesh is not litterally a beating heart, it contains all of sasori's cognitive functions which would include his mind/emotions.
Kisame's water prison moves with kisame, not the target, and V2 bee who is much slower than KCM Naruto was able to swim as fast as kisame could while dragging a boss summon and samurai rapping man.
Also, speed on land correlates with speed in water so Naruto should still be faster than kisame while in the water, and can still escape the technique via clone spam (since kisame won't know which naruto to go after) swimming to the top (since kisame can't fly) or using a giant rasengan to blow away the localized water around him (like gai did with his 6th gate).
Also my argument is samehada absorbs very little amounts of chakra from an attack and takes the majority of the attacks damage first before absorbing the rest of the attack. Here is the support for that argument:
Now if you look at
You must be registered for see links
, it basically proves that samehada only absorbs a tiny portion of the attack's chakra before it gets hit, which is why it dodged bee's sword strike rather than blocking it like it did to his raiton strike.
And
You must be registered for see links
is an even better proof of my point. If you look at the scan, Samehada and Kisame take the full hit of lariat, and then it starts to absorb the chakra. If you look closely at the scan, even the horns of bee's chakra skull penetrate through samehada (although some of their chakra has been absorbed).
The same thing would apply to other attacks especially those not made out of raw chakra. Samehada is no preta path, it does not stop the attack in its tracks and then absorb it. And even then we see that if the attack is dense enough, it can penetrate preta's absorption sphere.
how are the clones going to be distracted? And how is itachi going to tag clones that can move at ei level speed? if he uses amaterasu he has to focus on one and while he does that the other 2 end him. If he uses susanoo, he's going to have a hell of a time hitting one and while he does that the other bust his susanoo with FRS to the back. clone feints are not working as the clones are sensors and the clones have no attack that can hurt KCM clones.
deva path barely dodged an unguided FRS, if it was a guided one like what each clone is capable of doing, he would have gotten hit by it. the real naruto will be fighting deva, shinra tensei can be resisted, and with his speed naruto can easily capitalize on the 5 second interval between shinra tenseis even if he is blown away. in addition to that naruto took no damage from nagato's shinra tensei, deva's ones are not even going to hurt him unless they are the super huge ones.
FRS are guided and naruto can make them explode into a high AoE wind sphere by thought. if she is fully dispersed as paper, then yes, the FRS will not take out much of her, however she has to materialize most of her body in order to attack and thus naruto would hit her when she is in this form a he will immediately sense her due to emotion sensing.
with his chakra cloak he can at least tank those that are below the C2 bomb that blew sasuke's wing off. And with his speed, he is not taking any explosion near the epicenter. Sasuke was taking deidara's C1 explosions and smaller C2 without much damage, the KCM clones have the cloak which gives them super durability and have a lot of HP themselves.
Naruto doesn't need to hit a heart with FRS in order to kill it, a normal rasengan will do the job. Also, the base naruto that trolled kakuzu was weakened when he fought kakuzu in addition to the fact that his FRS was only half complete and in base. A kcm clone is way faster than that KCM Naruto has the complete version of FRS, and has much more chakra than him.
I'm not suggesting unlimited KCM clones, 13+ is naruto's limit. he doesn't need an unlimited amount of FRS either. And i'm pretty sure I have good knowledge about the capabilities of all the akatsuki fighters.