Mhhh... is there such a thing as a "soft reboot"? Because the series doesn't really need to get rebooted, but some elements definitely needed to be presented, or even written better. And not all of them are things you can change afterwards without going against what the series established.
Exactly. Nomura out of the writing team or within it but with limitations/supervision isn't "Kingdom Hearts without Nomura". I'd even say it's common sense, since even the most able writer is just one person and might need help with covering all bases or hearing different angles. I write stories and man if I know how much of this is true.
Either way, Nomura definitely has much room for improvement in his writing skills and picked up some bad habits he should try to grow out of.
Bringing Kojima into this actually gives much more ground for us claiming Nomura needs to be helped and/or supervised: some of them are mostly a meme, but there are definitely a lot of famous instances where Kojima wanted to do something absolutely crazy with his games and was prevented to do so. I like to think that those interferences also helped making Metal Gear as big and great as it was.
Giving carte blanche to one persone under the guise that "only they can do the job" or that it wouldn't be the same can actually become detrimental to the project itself.
We're all humans and not every single one of our ideas is perfect as soon as we think it. And self-reviewing them is extremely hard, given that of course our own idea sounds great to us.