After the update i noticed that leg animation while running is different, I do not like it so I ask for config option to use vanilla one.

The leg animation is fully vanilla, the only change is that the smoothing is applied to the legs too, so they might not move 100% as high as before(depending on the smoothing setting). I can add a toggle to make the legs teleport again, but it will make other animations look worse(getting in/out of vehicles, using a ladder, sneaking). Temporary you can increase the smoothing speed or disable the smoothing in general.