Same. I have Ryzen 5 1600x, RX 580, 16GB RAM. Constant stutters (FPS drops like 20-30 frames in an instant) during battles, tournaments, campaign map movement, absolutely everything. Changing all settings to very low changes nothing. None of the fixes people have suggested have worked. Lowering audio quality changes nothing. Vsync changes nothing. Frame limiting changes nothing. Switching from borderless to true fullscreen does nothing. Hugely, hugely bummed out by this. Unplayable.