I'm sure it can be improved, but the FPS in a turn based strategy game is largely irrelevant. I suspect this factored in the settings their Autodetect selects.
I'm not giving them a pass, but the frame rate issues and hitching in this game actually doesn't affect my ability to play it well, while in an FPS it would cripple it.
And yes, dialing AA to FXAA and reducing or turning off ambient occlusion makes an incredible difference in all the rigs I've seen.