I can see why you’d think that, but what you fail to understand is that valve is not the only one working on proton, and valve themselves did not even make DXVK. Those are free and open source efforts and valve even pays external devs to commit to that software. I’m telling you that DXVK itself is not going to give a boost to graphical performance because it literally cannot, those are extra instructions that your GPU has to perform in order to send out frames.
Directx to vulkan translation is exactly that, translation. It receives directx calls and translates them to vulkan. For one, it has overhead, two, if the game is optimized, it is already going to be running at max performance on windows, using DXVK is going to slow the GPU time down because it will have to perform more calculations. No scheduler will save you from that, not even the Linux one, because it isn’t something that is handled by the scheduler.