Successful update procedure form Sierra to HS. Though I admit it was more of a pain than I'd have expected, probably due to my NVIDIA setup.
After (forgetting to) transferring the FaceSMC.kext to the Clover kexts directory, I had the installer hang on the spinning wheel for a long time (Verbose mode reported it hanging on the WindowDriver, infinitely trying to restart it after stopping in 0 secs). Turns out (for future note, even if it was mentioned before) that if you have ANY NVIDIA cards connected, even when using the iGPU, you HAVE to disconnect/disable ALL discrete GPUs (So Clover cannot see them) before installation can begin.
After that roadblock, installation went smoothly. Rebooted twice, installed the Web Drivers update, reinstalled Multibeast drivers (mainly for audio), and it works!