Of course Firewalk and Haven are AAA. Fact that they are making live service game does not mean they are AA.You don't start with AAA studios, just like Firewalk, Firesprite and Haven aren't AAA.
They are not going to be AAA as they don't have a product to demonstrate their work so you are not providing AAA budget.
The Initiative is not the perfect example due to covid and they also had some internal problems, didn't they?
I am not saying it's easy, what i am saying is that it will be cheaper than 70B and has more to offer to consumers as a move than playing the games they were gonna play anyway.
Of course it is cheaper. But you are buying a publisher that is making you profit the moment you complete purchase. More than 2billion per year to be precise. Not to mention benefits it can have for your sub service and Console ecosystem in the long run.