Yes, that's very well know DX11 is shit, is awful at using CPU resources and Destiny is a CPU intensive game which makes int a worst situation for using DX11. DX12 will always be far superior, that's why on Division two you get better performance, but Bungie seems to be set on DX11 on the next expansions coming for the next years which is just ridiculous. They should give us an Vulkan update and get rid of DX11, but I doubt they'll put resources into something that won't go to eververse.