Figured this might help other people out too, I was messing around in my options last night, and under
ESC > Options > Advanced > Graphics API
I noticed on both of my computers that I was still running under Direct X 9. It takes a client restart, but it's worth it if you still aren't on 11. And I wondered why I was getting abysmal frame rates on my desktop in LFR especially on fights with a lot of stuff going on.