The article gave a good explanation of consciousness developing as a way of prioritizing and processing information. It also makes sense that projecting your own consciousness, or self-awareness, onto others makes for a useful social tool, but how does the prioritizing of attention lead to self-awareness? That may be a different question than the article was trying to tackle, but it's the only gap in what I felt was a very thorough article.
Really interesting view, and I think the author is in the right direction indeed. I think what's missing if this theory really wants to explain consciousness, though, is something to account for qualia. That my brain has a model for the world I can understand, but why are specific attributes of the model experienced in specific ways? The theory explains the "intuitive experience that the sky I'm seeing is blue", and it also explains why that is separate from the "verbal/linguistic/logic knowledge that it is indeed blue" but it doesn't really explain the characteristic of blueness itself that I'm experiencing when I see it.
Interesting, but if he wants his theory ("awareness is modelling of attention") to gain traction, he needs to address what is different about the modelling of human attention, that leads to our heightened self-awareness. Every good predator seems to have keen attention modelling skills, but so few appear to be self-aware. (Just noticed that what I've written is kinda similar to what Outlander said).