The graphic does what it's intended to do: give a high-level overview of machine learning concepts and techniques. Even if not perfect, it's a lot better than a block of text.
if you wanted to make things clear you're better off picking ONE problem and ONE method applied to the problem. the real challenges in understanding ML or DM are pretty much the same with all methods.
a graphic like that creates the illusion that it's transfered some knowledge when really it hasn't. that's why infographics are dangerous. if HN was my site i'd have it reject any article that has an image that's > 800 pixels high in it.
I look forward to your attempt!