Issue here is far more than any single detail such as "lighting engine". Various forms of temporal anti aliasing for example has nothing to do with it, and yet if you turn it off in quite a few modern games, you will notice a lot of really nasty shortcuts that were taken, because developers expected everything being smoothed over with temporal anti aliasing hiding the problems.
So your choice today is ghosting artifacts and everything smoothed over, or image with flickering, weird edges of things and so on. This is why a lot of games don't even let you turn temporal anti aliasing off any more, and instead merely offer you various different temporal solutions at least one of which must be on.
On the other hand, it saves quite a lot of time if you can just trust all minor issues to be smoothed over anyway, so it's an efficiency tool.
On the bright side, since a lot of people believe that VA monitors are suitable for gaming, they won't even notice the smoothed out image, because their monitor will smooth everything in motion out anyway. It's hilarious when you get someone with a VA "gaming" monitor to sit at a good OLED, and they are shocked you can read text on things in motion.