Aura89:

Yes, this is the issue. Sounds like you finally understand. The rest of your post implies you don't, but i'm hoping that first sentence will break through.

The rest of his post is basically in agreement with the bottom of yours. DX12 hands the developer a ton of responsibility once handled automagically by Microsoft/Nvidia/AMD. On consoles with one standard hardware implementation it's easier to debug that responsibility, find the issue/performance degradation and fix it. On PC the same issue might present itself differently across a variety of configurations, requiring either a separate codepath for each configuration or "catch all" fix that may not be as clean as if it was with a single configuration - making it not only harder to find (you need to test all different configs) but harder to fix it once you found it. That on top of what you said (that developers are integrating DX12 after they already built the game for DX11) definitely adds to the complexity/issues. DX11 was always supposed to coexist with DX12 - I don't see that changing. I think most of the larger devs have been getting progressively better at DX12 though - Battlefield and Division both have come a long way since their first go.