I agree with you though (others will not) that the Cybergrafx software is buggy as hell. I've never liked using it on my various Amiga's at all and always ended up going back to the P96 drivers. They say your mileage may vary, but I have yet to experience a successful and rewarding Cybergrafx installation.
I experienced a "a successful and rewarding Cybergrafx installation" for many, many years. BUT heres' the rule: if you have phase 5 hardware then use CGX, otherwise use P96. I did try P96 on both a CV64 and a CV64-3D. P96 felt much slower than CGX, the pointer did not move smoothly, dragging icons appeared to flicker, CGX had by far the more convincing Workbench emulation for look and feel. The thing is friends who used P96 didn't even notice those things till we had the screens side by side, one running P96 mine running CGX, but it did annoy them afterwards.