16-bit looks better, though I still get artifacts at the pixel level. I get better results if I use 32-bit, lower exposure to save highlights, export it for Photoshop and tone map it to 16-bit with the “Photorealism Low Contrast” preset. It pretty much solves the issue for me.
Admittedly, I am using Acorn not as a complete editor but as the first step in my raw processing workflow because I like the overall look and color I get
More control over noise reduction would still be nice, as would some kind of icc/dcp profile support, but I understand that it’s a difficult request if Acorn is using Apple Raw. I am still happy to use the software as-is.