Instead of AI investor upgrades to fix the previous tweak, I suggest something permanent because the fix to the nerf is a bit annoying especially if you don't want to spend any AI so you can have the most as possible for later on in the future of this game.
I'm not a fan of the tweak to the ratio. It changed from a rate you got innately to a rate you have to spend AI for. This is annoying especially if you don't want to spend any AI so you can have the most as possible for later on in the future of this game.