I did this guide ages ago, and have not followed too closely since. System is still running flawlessly, aside from the display flickering after sleep issue, which I hope will be fixed soon.
My only issue, which is minor and doesn't come up much, is the thunderbolt port. Has anyone managed to use data transfer over it? If I plug in my phone (USB C to USB C), I get no partition mounting (but I do get a new icon in my status bar that says 'USB Controller' with one option. 'Power off card'). I also tried using a USB-C to Female USB A adapter, which I've tested and used previously. It does the same thing.
Is there any way to actually use the thunderbolt port for this? I successfully use it with a Thunderbolt-HDMI adapter (which has issues too. It has to be plugged in before the HDMI cable if you want to use both, and takes a few times unplugging->replugging if it's not plugged in at boot.)
The only other issue I have noticed is the sound. Sometimes when I boot the system, the sound icon will be greyed out and not work. I have found a 'fairly safe' solution to this. If I boot with just the power cable (and no headphones or HDMI plugged in) it works pretty well. I can also boot with USB C->HDMI adapter with the power adapter and the sound will work. If I have headphones and/or HDMI in, it pretty much always fails.