Changing the filter doesn't change the map because they are all mixed in together, so the filter is the same for all types.
I have never had problem finding geo no matter where I land in the blue parts, it's everywhere, however I do agree a proper heatmap would be nice, they did change it because apparantly some people were confused by heatmaps, but I assure you every time I have landed where it's blue I find geo. I have double checked this by landing where it isn't blue, and surprise, no geo.
I don't know what you are doing differently, but it's there, in some places it may be spread out a bit but it is there, and every place I have landed there are lava spouts, gas vents and fumaroles if that's what the screen says, it's always all there, all mixed in together as I would expect from a volcanic site.