The cores on the GPU aren't for that sort of AI they are for machine learning and stuff like that. I'm not sure we have a way to properly thinking enemies right now. Maybe once everything is running off the cloud and they can just throw massive resources at it that will change. I know people see cloud gaming and cringe but it's coming, the PC is going to be the first there as well just as it was with 3d, online, paid DLC, pay to win, and all sorts of other nonsense but it's not all bad. If you and everyone are playing on the same hardware with the same stuff and the game can just throw all the resources at the AI interesting things can happen.