Thank you first of all for the feedback.
But overall yeah its finding points of good contrast that I am struggling with so I will definitely have a look at Plutarch's Lives as this could be my connection to ancient myth. I think I will use the critic of Brandon as a 'mix of J.R.R. Tolkien and George R.R. Martin' as a springboard for my critic, perhaps also comparing him to Rothfuss. But the area of most focus for me (and the thing that is so hard to define) is why Sanderson is such a refreshing fantasy writer, not just the old themes and motifs with a new paint job, but instead an original take on these ancient themes. I like the 'mix of ...' critic above as it gets as close as I have seen to the uniqueness of Sanderson; it is, of course, an oversimplified version-but still close to the mark. But it is developing this idea that I am currently struggling with, trying to pin down why (for me at least) Sanderson isn't just another excellent writer, but one of the most insightful writers of the century (so far).
But if anyone has any links to any academic material on Sanderson, or on this area of study, in general, that would be much appreciated
Cheers in advance.