no one (with a healthy human brain) will will make a difference in your career this defaillance to Platinum and not even to Kamiya. But as Kamiya said they were not ready (technically) to do that game. why so hard to accept it ?
Because having worked in the business for many years I know how unrealistic and wrong-headed edicts from external producers can wreck projects. All it takes is for them to stop listening to what the devs are saying and things can derail double-quick.
Kamiya's tweets during development betray his increasing frustration with MS. Technical problems would have become quickly apparent, so why couldn't they have just pivoted towards a practical solution? Would compromising on the multiplayer aspect really been such a deal-breaker for a new IP? Especially coming from a team FAMOUS for great single-player titles?
That they didn't, and instead allowed the project to stall indicates pretty conclusively to me that they weren't ALLOWED to. Because that's the reality of contract work, if the publisher wants Strauss waltzes then they won't pay you until they hear them. Its really that simple.
That they allowed the project to linger in development hell and eventually die, as opposed to pivoting to a compromised form does support the contention that they had specific demands, or even that it was a deliberate gambit to tie up Platinum. Because paranoiac as it sounds, such practices are not unknown. Bleeding studios out as a precursor to attempting to buy them is a thing.