Yeah I guess it’s tough to judge anecdotally because screen size and how far you sit make a big difference. I have a 55" and sit a few meters away, and run 300% DPI scaling in Windows. Looking at the size of stuff on the promotional screens I get the strong feeling that everything will be too tiny for me.
If it’s not too much trouble, maybe you could post a screenshot running at 4K res with the highest DPI scaling the game allows? Then I could check it on my screen. :)
I guess the DPI options shown depend on your screen too, the screenshot in the manual only has two:
What is the largest percentage it allows on your 4K?