> Spin out tens or hundreds of smaller teams with their own independent creative direction to try out new ideas.

My impression is that big game studios would rather put all their eggs in one basket where they're (fairly) certain they can make a decent return rather than spreading it around a bunch of smaller projects and hoping one of them turns out to be Minecraft. This is the same dynamic driving large movie studios to invest huge sums of money in a shrinking number of huge blockbusters.