Too many ifs.
Naruto is the descendent of the younger son of the Sot6P through his Uzumaki lineage and therefore has the life force and chakra reserves necessary to host the Kyuubi
Sasuke is the descendent of the elder son of the Sot6P through his Uchiwa lineage and therefore has the visual and mind power
Sure, you could reverse their innate abilities and make Naruto the one with eye and mind superiority and give Sasuke the chakra reserves and requirements to become a jinchuriki, but there is a reason this manga is called Naruto...He has the stronger innate abilities, including the ability to host and befriend tailed beasts.
Also, Kishi has already hinted to the fact that Naruto is the most akin to the Sot6P through his will, ability to distribute chakra and attune his chakra to other human beings. This is made very obvious in this Panel:
Naruto is the descendent of the younger son of the Sot6P through his Uzumaki lineage and therefore has the life force and chakra reserves necessary to host the Kyuubi
Sasuke is the descendent of the elder son of the Sot6P through his Uchiwa lineage and therefore has the visual and mind power
Sure, you could reverse their innate abilities and make Naruto the one with eye and mind superiority and give Sasuke the chakra reserves and requirements to become a jinchuriki, but there is a reason this manga is called Naruto...He has the stronger innate abilities, including the ability to host and befriend tailed beasts.
Also, Kishi has already hinted to the fact that Naruto is the most akin to the Sot6P through his will, ability to distribute chakra and attune his chakra to other human beings. This is made very obvious in this Panel:
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Dude are you a human or a Wookiee, cause I can't understand half of what you are trying to say (I guess I put my Wookiee Alien cap on and try to decipher what your points are).
Your point (I think) is that Naruto not being a skill ninja is OK, because he have so many other chakra outlet to go to, outside of his own large reserve of chakra and that he don't need to learn his other element, because he can use Sage mode (the reason he can use Sage mode, is because he have so much chakra of his own to trade off).
My point (if your were a human and could understand), is I think Naruto is overrated for the same reason and him at least losing Kurama, open up the possibly of him becoming a greater ninja overall.
Sasuke have the Sharingan and is becoming the best Uchiha ever and without the Sharingan, Sasuke is one of the most skill ninja in the Narutoverse (like Madara, Kakashi, Tobirama and other all time greats) and is a genius and also can control/ manipulate ninjutsu like no one before him, like many characters have said over the manga (Kakashi, Oroachimaru, Kabuto, Obito and even Kurama) and once again if you paid attention and could understand what you are reading, you would know that by now.
If you trade Naruto chakra outlets to Sasuke for his Sharingans eyes, Naruto would have been a average Uchiha (like Obito) and Sasuke would have been top five ninja in the Narutoverse at 12, who if was taught sage mode at 12, would of learn it in a hour and would of been only 2th to Nagato and by now at 16 would of already been at the level of Madara & Hashirama, if not surpass them. Kakashi and so many more ninja's would be better than Naruto, if they had his chakra, when in Sasuke case he have show that he is more of a genius than Kakashi, by taking chidori to many more levels on his own (when it come to the Wind Resenshuriken Naruto needed Kakashi to tell him what to do, then how to use a cheat jutsu, that only he could perform cause of his abundance of chakra, to learn Resenshuriken faster than he possibly could, since he not a true genius like Sasuke and that Kakashi words not my).
Also I think you might be the one ahead of himself and need to pump their breaks, cause we don't know what Kishi is going to do with Naruto vs Sasuke. Kishi have already made Naruto quote that they will die together in their next fight and we seen Kishi let Sasuke beat the skirt off of Naruto before. So yes I believe Naruto should somehow come out the victor this time, but you and I don't really know that. But what I do know is for Sasuke to have a chance against a Naruto with a full power Kurama or 10 tail Juubi (like you Balls Boys hope and would curse Kishi if he instead gave those things to Sasuke), then he need to give Sasuke a new beast or let him eat the apple of the tree, to make it a great fight (cause the rinnigan is nowhere near enough against all those chakra 's outlets).