I have my own Sony sources - and I can tell you on point (1) - everyone across US/EU/JP has been sidelined in some shape or form in marketing and freedom to do business deals. That was the intended effect of Sony's globalization effort, basically every region's marketing and functional independence has been greatly reduced in favour of a 'global team' - that is spread across all regions. That's the reason we don't see anymore quirky Japanese ads, but rather they all follow the global 'explorer' template.
The departures of people like John Drake were hinted to be as a result of this globalization impact according to some reporting earlier separate from Bloomberg. It's not just Sony Japan that are feeling that frustration. To my understanding, there has been quite a fair bit of lay-off and job reductions in EU offices as of the past two years, basically cutting off any jobs that are seen to be duplicative across regions. I don't have Japan support sources, but I did hear those cuts were global.
Are there some regions that benefitted more than others as a result of globalization? Sure. This is just my LinkedIn sleuthing, but from what I saw - EU Sony employees were the ones who benefitted most in terms of filling up the global third-party team, the team that John Drake/Gio/etc were on for the US branch. So in regards to one function of Sony's global structure, it was EU team that "won out" - as opposed to the US team. Granted, my understanding is that some region has more representation than others in regards to the global team.
Point 2 doesn't dispute what I said earlier about Japan Studio being sidelined. Like I said - I didn't refute or disagree that is happening. It's just no related to Sony's view on Japanese market. As someone who likes Japan Studio games, I don't like it. But I also see that Sony doesn't care about needing JS to be 'better' in order for them to do well in Japanese market.