I agree, I think it trades off being ever so slightly easier to read with being so damn ugly I don't want to read it. I actually think Comic Sans (as ugly as that is) is easier to read and less ugly than this font.
I totally agree. I would much prefer to struggle through without it. As a side note, I find it hilarious that they chose to do this with a mapping tool. From what I've gathered from other dyslexic folks and in my experience, maps are actually especially easy to deal with.