I'm going to agree with the majority of people here and say the secure erase feature is pretty neat. I use Parted Magic so having this feature built into the UEFI definitely saves me a little bit of time booting from a USB stick and doing it that way.
I'll give this a shot! Been eye-balling a new ROG board and coming from an ancient Asus P5E-VM, everything is an upgrade to me. But specifically I would use the CPU level up to make it a tad easier to give me a ball park what the CPU is capable of. Then I can use that as a base to make more adjustments.
If I can only pick on new feature, secure erase is the biggest single improvement I am looking forwards to. While I want all of the other improvements as well, secure erase is one I will be using from day 1.