@fomnus we are working on optimization as well as crash and bug fixes. However, given the broad range of systems, I cannot reliably say if or how much you will benefit from the first couple of optimization changes.
When can I approximately expect the game to be in a playable state (at least medium settings, 30 fps)? Currently my PC runs out of physical memory less than a minute after loading into the campaign map (if it even manages to). Windows 7 x64, i5-4570, 8GB DDR3 1600 MHz, GTX 1060 6GB. Windows and GPU drivers up to date. BIOS and chipset drivers are stock though (I have a fairly old z87 chipset mobo, Gigabyte Z87M-D3H). I also use Asus Xonar DGX with not up-to-date driver. But these shouldn't be messing with the game, it shouldn't be that older hardware drivers are critically dysfunctional in new games. I read the requirements tab in Steam and I didn't expect it to be that bad, I expected the game to be at least playable on minimal settings so that I could practice combat and learn base mechanics.