I enjoy some of Sanderson's stuff, but he really suffers from the mentality that everything must be explained, and everything must be a comprehensive system. I know he really preaches on that, that magic must make sense and feel like a cohesive system of thought, but the problem with that, is it no longer feels like 'magic.' There isn't a sense of mystery at all, and it basically becomes science with a different name. This can be fine when properly done, but Sanderson (and his fans and acolytes) take it to an extreme. For example, the assassin from WoK is much more interesting before you understand about lashing and how the magic system works, because he has clearly defined powers with limits, but how it works and why isn't understood, so there is an element of mystery to it. Once this is explained he suddenly becomes much less interesting.
Also I am just not a fan of the modern take on "worldbuilding" period, where everything must have a history and some story or background to it. People always want to talk about how cool the lore of a world is, and how deep it is, and Lord of the Rings is always cited as deep lore. But, even if you take all the books Tolkien wrote, and the supplemental material, it is still shorter in page and word length than just the first 4 books of Way of Kings series. Tolkien wrote a story by focusing on the story first, and the worldbuilding happens in the background, and it feels believable because there aren't lengthy sections describing the history of whatever, it is shown through character actions and conversations, or if it is told, it is done briefly, almost as an aside, rather than a key feature of the books.
