Thanks for ripping my story apart @TheSlySage as for your question how obito has beaten mikoto and minato is all because of situation. The duo had to save Kushina and Naruto and that is why their mind was diverted and kyuubi was summoned as well.

And Minato haven't Kamui seen from anyother Uchiha other than mikoto so he had no reason to suspect anyone will use that ability, he was informed by mikoto when he confronted obito.

Three of them did reaper death seal/dead demon consuming seal because it requires a lot of chakra and minato and kushina combined did not had enough to use it so three of them used it

You say about good kurama but he was controlled by Obito for most part and later fighting for domination due to the genjutsu obito put him in.

I have only revealed key points and some spoilers and I don't think giving away his abilities and when he will awaken it is not issue as I didn't gave away how he will awaken them.

But I am discontinuing all of my stories and will work on new ideas with good summary and plots.

Thank you for all the love and support...