Typically, there is controversy around this talk. I thought it was interesting. I like the distinction between schema and selection. I think the idea of selecting down into a tree is promising, and it'll be interesting to see how it works out in practice.
However, had I been asked, I would have suggested some improvements based on things I've absorbed as an outsider to static typing who started with, roughly, Hickey's biases. None of them would weaken the technical point of the talk, just its positioning of the work with respect to other people's. I think that positioning is misleading.