I seem to be in the minority on this opinion but I can't stand the heat map on every map in the maps tab. The color isn't great but I can deal with that, mostly I just want to see a consistent color for the areas I've been to. I already know that I've found less caches in places I've only traveled through, I don't need a shading system to tell me that. Checking the maps after a trip used to be my favorite part of Project-GC but now I barely like it.
I looked around to see if I could turn it off but I don't think there's a way. It could be as simple as a checkbox in the settings, although I'm not a programmer so I don't know for sure how hard it would be to actually write out such a thing. I don't have a paid membership here as of now but I'd 100% pay up if it meant my maps were solid color again.