Red: Yes it is, Amateratsu engulfs anything it comes in contact with. If Naruto didn't match the ratio it would of just turned into a bigger flame without the benefits of the Rasenshuriken's celluar or the fact that Rasenshuriken's ability to be a projectile. Even the second time when they struck Juubito with it, they match their ratios well. If Naruto didn't maintain it it would of absorbed the wind from his rasengan. If you're saying Sasuke was actively removing
Amateratsu(because Amaterasu consistently engulfs) to match Naruto's rasenshuriken, then you're bullshitting.
Yellow: No it wasn't, if you look at the scans again you'll see why.
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Notice during the 1st build up forming the first TBB in the set to follow, Naruto eyes, they are different than when Kurama gained control to talked to Kakashi here:
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The iris around Naruto's pupil is more prevalent
Blue: You're completely wrong, you're comparing a part 1 Naruto who was naive to chakra molding, rotation, and maintation. To a part 2 Naruto who mastered Rasengan to the point where he can add wind nature to it, and use it with one hand. The first time he attempted the TBB it blew up in his face.
To add to that fact, when forming the TBB it consists of a Black and White chakra that has to be in a set ratio. Rasengan requires only
Naruto's Chakra,Shape,Rotation, and Maintaining it. TBB is that, rasenshuriken and then some
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In this scan, Naruto even mentions it doesn't feel like it can be compared to a normal Rasengan while in that mode.
Green: I'll try my best to show you why Naruto not only has precise chakra control but it's on a larger scale than the yin seal and Sakura's pinpoint chakra punches could ever amount to.
Super-Mini Tailed Beast Ball is a TBB but condensed down into a small ball while still maintaining the 8:2 ratio. Given the large chakra pool Naruto has and the scale a regular TBB is, that's incredibly precise. He also managed to maintain that ratio after his clone dispersed.
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Continuous Tailed Beast Ball
It's TBB's fired in rapid succession. That requires you to get the Ratio correct in rapid succession, multiple times.
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Not to mention Naruto managed to match the combined TBB of all the other 6 tailed beasts, while still maintaining the ratio.
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