My guess is that it is just more CPU intensive than Xenoblade Chronicles. The CPU in your computer is definitely the choke point of your system. Can you give it a try in the latest 5.0 dev build and see if some of the more recent changes have had an impact on the speed?
Were you using OpenGL, D3D11, D3D12, or Vulkan?
Were you using OpenGL, D3D11, D3D12, or Vulkan?

