Could you elaborate on the issues you’ve been having? Been using Catalina since the beta and haven’t really had any major problems..
Scanning with Samsung MFPs in color into PDFs is still broken, but this one is since 10.14 actually. 10.15 just made it worse, because the Samsung scanning app that could be used instead of Image Capture is 32-bit, so the workaround doesn't work anymore.
Most of my problems have been on older machines, so perhaps their QA has tanked.
It was pure curiosity on my part, because I haven’t really experienced any major bugs or problems.