So book 13 is out and I'm halfway through.
In the glossary is the answer to the big question of book 5, which is who killed Asmodean.
All round, the writing is pretty nice, only a couple of scenes I would call useless, whereas most scenes advance the plot or build the character. That was a problem of book 12, where it took Aviendha three chapters of trying to figure out something which took me half a chapter to realize. What a waste of time!. But somehow it's a little repetitive, with every chapter involving at least one scene where a character meets with a character and they have a conversation and something is solved. Can't spoil it, but something is always accomplished.
Also, I like the way Sanderson pokes a little bit of fun at the plotholes in the series he'd picked up on but RJ apparently never did. He doesn't make them glaring, but he does make characters go "Wait a second!" and address the issue. For example, (BOOK 13 SPOILER) Perrin suddenly realizes that he could have used the Wolf Dream to scout for the Shaido Aiel who had Faile captive. Pretty funny scene, actually, because it was something I had been yelling at him to do when I was reading those chapters when Perrin was trying to accomplish it.
Over all it's very nice and I'm looking forward to finishing it.