It might not be enough for you, but maybe you're not the target audience. His blog is quite popular so clearly it's enough for a lot of folks.
What is "good" communication depends on the social context of the communication, the audience, etc. A novel probably shouldn't be written in the same style as a project status update document. IMO one of the downsides of people in our modern education system being drilled on the "one true way" of communicating for a small handful of contexts (position paper essays, tactical business memos) is that they begin to think that is the only way to communicate ever in any context to any audience and forget that different people have different tastes and in a lot of contexts catering to your audience's taste is what matters.
What is "good" communication depends on the social context of the communication, the audience, etc. A novel probably shouldn't be written in the same style as a project status update document. IMO one of the downsides of people in our modern education system being drilled on the "one true way" of communicating for a small handful of contexts (position paper essays, tactical business memos) is that they begin to think that is the only way to communicate ever in any context to any audience and forget that different people have different tastes and in a lot of contexts catering to your audience's taste is what matters.