I will drop my opinion here (not that it matters to anyone):
Im a huge MGS fan (first 4 games) and I think the more control Kojima gets in his games, the worse they become.
His best game is MGS (PS1) then the quality varied for the next 3 games (personally I like 2,4 then 3) but they are close enough, DS is Sh*t, MGS V was Sh*t .. all MGS spin offs were Sh*t...and
Dude started balooning game budgets with his useless B-Teir Hollywood actors and started using the gaming medium as an entry point to Hollywood!! So its obvious that his passion is no longer this medium!
I kinda understand why Konami sacked him and I believe it was the right choice in the end!