Which doesn't change the fact that his blogging is incurably pessimistic.

Pessimistic? I don't think so, he's facing the problems full on; asking hard searching questions about his chosen field and working for new insight.

That is not a pessimist, that is someone who has faith that he can find a solution; even if it is not obvious to him at this time.

Sounds more like a bit of writer's soul searching to me.

I find his work unreadable, but I suppose that is a minority opinion among SF fans.