It got back on track with Knife of Dreams finishing up many of the unfinished plot lines. I don't think for three books Sanderson's joint work moved at any greater pace then Knife of Dreams. Both the last three and KoD move at a pace more reminiscent of the first 6 books, before the lull of 7-9 and complete standstill of Crossroads of Twilight.Has been ages since I read them but from memory Sanderson kicks the plot into overdrive and gets through it at a breakneck pace.