The Witcher 3, GTA V, Final Fantasy XV has been the 3 latest games I have truly enjoy on PC gaming and were not released for Linux based, well, not without Wine. - Even League of Legends is not natively supported on Linux @_@
Linux > Xserver> Wine
I know is not a wasteland per se, but still is a noup noup for me.
I don't want to sound like I'm trying to force Unraid for my setup (I'm pretty open to suggestions) I was researching on a full Linux distro setup instead of Unraid for KVM and came across using Fedora server 27 for that, the process itself looks pretty simple. Although there is no much information about pass-through, etc... once the VM's are up.
However, at the end of the day, one thing won't change and is that the i5-4690k needs to be upgraded ASAP. This chip can't stand 2 Gaming VM properly.