For those keeping score at home, I just seen there is a new BIOS revision for the motherboard
Version 0601 - 2018/05/02
Update AGESA 1.0.0.5
recommend to keep C-State [enabled]
Woot now that's a bios revision I'll jump on, I know what I'm going to do tonight! Any issues, I'll update this post with more data.
EDIT: There was one issue on flash. I don't know if this was from version level, or the fact that I skipped a bios generation, but all settings in the bios were reset to factory defaults. So, be sure to take note of any custom changes you make in your BIOS, prior to flashing.
Also, worth noting, per the website's recommendation, I kept C-states enabled (again, didn't seem to be an issue before), and deleted the line out of my go file - syslinux and go are basically stock at this point.