As you may know it, as of today, both HoI4 and Stellaris have a new setting called UI Scaling. While experimental now, it has proven to be useful to both 4K screens and low res ones.

Now, I play EU4 on a laptop, so my resolution is pretty low (1096x768, or something like that). EU4 has a problem with low res screens and some buttons added in the recent DLCs, like the Military tab is heavily bugged (can't select or recruit generals due to overlapping between their screen and the mothball forts button), and that problem could be easily solved with a UI scaling option (I don't know if you can do this already by editing some files).

So, we will see this option in future patches?