This looks great! Considering Team Ueda's headcount, we could get like 4-5 more indie studios out of the talent that once made up that team.
That's not really how Japanese companies tend to work, though. They use the more general large company style (I believe places like Midway and EA worked like that back in the day) with no walls and dedicated office groups, where there are just a pile of staffers, and they're doled out as needed and shifted depending on the demands of the project. You'll work on one game now, a totally different project later on. When you're committed to a development, that's your "team" and the group does solidify in that process, but you don't necessarily stay with the same people throughout your career (though creative heads do often pull common staff, and there are of course people who specialize.) Nowadays, with 100+ staffers working 3 years on a project, you can't really work so loosely in most companies; that's also unfortunately a factor in the harsh project launch cuts and to a lesser degree the annualized game projects, there's not the same ebb&flow when the scale is so big.
Apparently, TGL's downfall is supposedly how Puppeteer was able to spin up so fast, they had a lot of bodies ready to jump ship when Last Guardian was put on development turnaround.