J Lo: Sorry for the stupid question, I don't know anything about coding; how feasible is it to improve the AI?
If you refer to the current zombie-like pedestrian AI, it certainly is possible.
But a more complex AI, with an increased action set (as in, an AI that does more than just walk back and forth), would be more taxing on the CPU, especially in crowded areas.
That's why it already is recommended to decrease the pedestrian count if there is noticeable FPS drops when for example driving around in City Center.
What would be most likely impossible to improve, however, is the absolute joke physics in the game. Fair enough, CP77 isn't a driving sim, but a certain amount of realism is expected from a game that set its own standards so high (and under-delivered in almost every aspect).