Ingame when you move your camera around a bunch, screen tearing is very noticeable because VSync is always off. I suggest add an option to turn it on and off, and also make an FPS slider that is a minimum of 30 and maximum of 144, since those are the most common hertz for monitors. This could also help with optimization.
Agreed. The game really should have more customization when it comes to video and performance settings. The sensitivity setting for PC players has been broken for a while as well. It literally does nothing.