Menu lags a lot, sometimes it's less than 10 fps and it's really hard to navigate. This occurs when pressing esc ingame as well. Arcade is impossible to play with it looking like a slideshow. Multiplayer works fine but you need to have your ambient occlusion setting put to normal HBAO, full HBAO leaves your screen with black shadow ghosts of areas of the map.
Try to disable instant replay. This fixed it for me.