It has nothing to do with engine...R* games have considerably superior and physically correct animations than what this game has, and also they have a lot more of them..that's the reason why you have the lag. If GG wanted they could have implemented physics based animations in their engine as well where animations take priority over controls for the sake of realism...which would have led to similar lag.The camera controls are so responsive i wish Rockstar would dump there input lag infested engine and made RDR2 on this engine instead.