Sadly, the average Joe can live with a Single Core with HT.Dont confuse an enthusiast forum with the broad market. Unless average joe wants a hexcore over a quad with no penalty its not going to happen. You are not part of the 99% crowd.
And for the 5820K, remember you compare apples and oranges. 15MB cache and quadchannel. Remember why Broadwell-C performs so insanely good compared to its speed? Or What Skylake needs to stretch its legs on the LGA1151
DX12 if anything will lower CPU usage, not increase it.
And if you are willing to pay for a 6700K. Why not a 5820K?