Hopefully I'll get some answers that can clarify what's going on.
Hopefully you'll get better support than I did. All they did after a few days was confirm that it was a "known issue"... no workaround, hotfix, or patch... just that it will be "fixed in a future update" with no time frame given. Now I have to figure out the best way of releasing a partly "defective" product that will be "fixed in a future update". Very disappointed.
This biggest problem I have with high DPI support is that the font rendering doesn't appear to high res. Isn't that THE basic part of high DPI support? Even the latest 10.2.3 IDE has horribly fuzzy font rendering as compared to almost every other app on my 4K, Win10 200%-scaled display. What is the deal with the poor font rendering on high DPI systems?
Yes, this is definitely something that needs to be addressed. In Windows 10 if you use the Scaling feature in the Display setting, the fonts in the IDE are fuzzy as you say. So Windows 10 now allows you to turn off the Scaling for a particular program. When I do that for Rad Studio, it crashes and won't start. So I am left with either no Scaling and small fonts in the IDE or larger but fuzzy fonts with Scaling > 100%. And I don't even have a 4K monitor, just a QHD, and I still don't like it.