you don't seem to understand what the edo state does.I know right he should've gave it to him when he first came... i mean minato has unlimited chakra so he doesn't need kuramas chakra!
^^agree.Actually Naruto should give Minato his half of the kyuubi chakra. Minato is the superior ninja and should be the one with the power, he would have a better chance against Juubito. Then when its time for Minato to be sealed since he's an edo tensei, he can give the full power to Naruto.
you don't seem to understand what the edo state does.
the edo state doesn't increase the chakra capacity.
kcm increases minatos chakra capacity allowing him to do more powerful jutsu.
chakra capacity = the limit of how much chakra can be used.
^^agree.
minato with yin and yang chakra would be more useful than naruto, sadly this won't happen.