The Custom Depth pass solution didn’t seem to help, as again, that requires a full Cel shader set up, from what I understand. After further investigation I can see that they’ve actually added an option in Unreal Engine 5 to disable Post Processing effects on 3D Widgets, but that doesn’t really help any of us in our current situation. And no, the option thats in Unreal 5 isn’t in Unreal 4, just hidden. At least, I couldn’t find it if it is.
One tiny solution I found (but that doesn’t look very nice) is darkening every element’s tint in the widget. Simply take the tint and drop it from white to a dark grayish. I noticed this made the colors less washed out and bright, but it also seemed to lower the saturation just enough to be noticeable. Not to mention, CA, Motion Blur, Exposure, and other effects still overlayed the text, effectively turning it to chickenscratch.
Anyone got any ideas?