I’m having similar issues, I have to say that even other devs (Euro Trucker) are lagging in Native Mode, and it seems a bit of change in approach over DK1, I hope gets resolved, as the way it sits now it’s a $350+ Paperweight on my desk. As having to swap drivers, and dealing with compatibility mode is not something I was prepared for, or wanting to do, given that I go in between Unreal, and other “U” based engines…