This is awful. I was just pointed here in a response to my thread in the support forum which is still unresolved. If I launch the game from Steam it only uses 2 of my CPU's cores unless I manually force it to use all 8 in task manager. I thought I had found an acceptable workaround in using the standard windows launcher, but now that's being taken away. Guess I too am submitting a ticket for because I need this resolved and Steam support is no help at all.