The title says it all. Techpowerup and Overclock3d.net did PC performance reviews for the game, and AMD's offerings fell short by a huge margin compared to their nvidia counterparts. Hopefully, with some user input, we'll be able to draw enough attention from AMD to push a fix?
I doubt AMD will waste time optimizing DX11 version when they are working on DX12 with async compute.
The performance is actually fine when I play the game. Just disable the MSAA (I'm injecting SMAA), and the game runs as smoothly as Beyond Earth for me. It's also an AMD title so the DX12 patch should follow soon, but the game runs fine.
I upgraded to the newest drivers and tried the new benchmarks in DX11 and DX12. With DX12 my frametime improved by about 5% (graphic benchmark), turn time improved by about 1.5% (AI benchmark).