Gonna save you guys alot of time and say a few FACTS:
Minato has the Yin side of the 9 Tails sealed inside of him, we know this because when sealing Kurama he clearly states that he only has enough chakra left to seal half of it inside Naruto, the rest he sealed inside himself with the RDS. The half that was sealed inside of him was the Yin Part of Kurama's Chakra, this is also shown by the fact that whenever Naruto interacts with wood like zetsu or tree's while in KCM, they tend to grow and get stronger, this is caused by them feeding off of his abundance of Yang chakra.
The 9 Tails cannot simply regenerate this chakra that has been sealed for the same reason Orochimaru could not simply regenerate the chakra from his arms that were sealed.
Minato still has the Yin Side of Kurama's chakra based on the fact that he is even able to go into KCM.
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Its like this, Kurama was once a 10 gallon box, now he is a 5 gallon box, now if you fill that up with Water, and then drink it all, you can still put more water inside of it, but he can never exceed 5 gallons until the rest of his chakra is unsealed.