Strange thing happened yesterday. After updating to 10.13.4 with Asus RX 560 OC Evo (basically RX 460) I could use macOS without Whatevergreen and everything worked great. Yesterday I played in BIOS with overclocking little bit (Asus ROG Z370G) but just with that - frequency and Core offset.
After reboot, cursor started to stutter horribly, but after I went back to Whatevergreen, everything was fine again. No changes to config.plist, no changes to drivers, nothing. No InjectATI, no RadeonDeinit, no framebuffer injection, just straight clean config with what's needed (plus ig-platform-id for headless iGPU setup).
Dual monitor setup, 4k via DP, 20" Cinema via DVI.
Strange…