Why? Then the devs you love would be controlled by investors and shareholders. You won't be likely to get the games you love anymore.
AAA studios already have the ability to fix the problem, they just don't want to:
- Fire more people to reduce studio size, there is no reason to have more than like 150 people, realistically
- Focus on smaller projects that can be developed faster
- Put all the game content in the game at launch
- Smaller game means less dev time and more and better bug fixing
- Make a fun game first, then decide the details
For some reason they think that retaining every single employee and developing impossibly huge games is more important though.