Well it is not optimalization, it is rather evolution and extension. Already they need to put there the firearms mechanics and changed it to support sandbox open wolrd. And dont underestimate them - they are skilled so I think they can do it and for me it is one of the most important things for the game like CP2020 - it needs to feel crowded. This is how hitman looks like and I think its pretty awesome
This.
And they also shouldn't make the crowd too generic, meaning "all the people look the same". Not saying that Hitman does this, anyway. Everyone there should look unique in a way.