Would have been good to see 8600K/8700K results in there, alas they released the results days before the launch. This game seems to take advantage of extra available cores/threads, even between the 1600X to 1800X there is some performance scaling.
Also, the demise of the 4C/4T CPU for gaming has been greatly exaggerated. Even in a highly multithreaded game engine as shown here, performance is not that far off a 8C/16T CPU.
Goes to show that IPC + clockspeed still matters the most in gaming, followed by core/thread count.