Hi R C-R,
Thanks for your feedback. I am not interested in Inkscape for vector work and was just interested to see if I can get good vectorization of the texture brushes through its Trace Image function. I downloaded the Mac version today from the Inkscape site only to test this out. I created the attached files with it to see how it fits my Affinity Designer workflow. It seemed to work for me. Affinity designer is my go to vector app and I don't see myself switching to Inkscape, you may be right about the future Mac version availability of Inkscape.
What I posted was something which people who use raster brushes in Affinity Designer and come across issues in print quality, may find useful.
Thanks.