I think that live action would actually be easier than it may seem, at least for Way of Kings. Way of Kings doesn’t have all of the Radiant CGI necessities (except Szeth, who mainly just runs on walls, which would just require a bit of magic with the sets), and it mainly is about the characters themselves. Also, the Shattered Plains is the main location of the book, and that would be easy enough to CGI into a desert location.
The harder CGI would begin in Words of Radiance, and I suppose I might be biased, but I believe that with the recent success of things like Game of Thrones, the Stormlight Archive could be a very popular live action movie/series.