From what I recall, these critiques of philosophy are well-known in philosophy, especially reactions to Aristotle. A inexperienced reader would get the impression that Aristotle and the mistakes he engendered went unchecked for a couple thousand years, until brought to bay by the sterling efforts of Bertrand Russell and Paul Graham.
From someone proposing a new approach to philosophy (!):
1. I would expect to see a little more on some of the less peculiar empiricists - Berkeley, in my dim memories, was the most obscure of that little grouping.
2. A less Cliff's Notes discussion of what's happened in analytic philosophy that strays beyond the brand names (Russell, Wittgenstein) wouldn't go astray either. Claiming it's all about 'language games' is a sophomoric 'out' to having to engage with any of the rest of analytic philosophy.