Better performance allows us to turn the graphics up even further.... i.e. for the division on my PC with dx 11, I had dips to 30s, usually around 40s to low 50s and quite a few settings turned down to medium/low/off with the object detail + distance slider set to 10/0%
With dx 12..... I could turn up about 4-5 settings to high/max as well as the draw distance slider + object detail slider from 10/0% to 70/60% and be locked to 60 fps (vsync on) 90% of the time, my FPS never dips below 50 fps with dx 12
Same with every other dx 12 game I've tested on my PC, far better performance and as a result, able to whack the graphics to max.
Does the opposite in bf1, or at least did at launch and for many months after.