That may be fine for you but I'm bring neutral and giving him average iruka/kakashi level reserves. Narutos chakra is largely to do with his stamina which stems from kurama's abilities if endurance healing. I wouldn't be surprised if Narutos jutsu are stronger because of it. Anyway I'm also basing it on Narutos inability to summon a toad even after Jiraiya removed Orochimaru's seal. Also during Jiraiya's training he weakened the seal a lot further increasing the mixture and drawing ability. It is afywr that Kakashi comment on Naruto's reserves.
I respect your neutrality and your basing it off of things, but in the end, we still don't know exactly how much of the growth of Naruto's chakara reserves over the years was due to Kurama leakage, and how much was due to aging/training.
Also, you mentioned Naruto's inability to summon a toad, but if I am thinking of the same scene as you, then that was part 1 Naruto. Kids of that age usually don't have the chakara in the first place to summon something like Gamabunta. Even so, the same part 1 Naruto ultimately did manage to summon Gamabunta while just using normal blue chakara (as seen against Gaara).
Anyway, I already acknowledged in the OP that his reserves wouldn't be massive. I just don't think they would be so extremely fodder as you make them out to be.
As another point that I haven't touched on: Naruto and Sasuke would still be transmigrants even in the alternate reality (as long as Madara died before Naruto and Sasuke were born). I can't say for certain, but Asura's chakara might still come into play.
