I'm not the much of a fan of the Chasm-Scene, but the one thing I really loved about it was the play on truth. When Shallan asked Kaladin for his story, it reminded me of Shallan being asked for a truth in WoK. Of course, Kaladin didn't gain any power from it in the way Shallan did, yet he might have gained some anyway - spiritually. In turn, Shallan is gaining strenghts from this truth - just like Pattern said. Of course, it's not her own truth, but it's what leads her there eventually.
The flashbacks didn't do much for me, for the most part. The revelation that she killed her father (and mother) wasn't exactly unexpected. What I do appreciate though is getting a better perspective on her brothers. The cruel-siblings-perspective I had when finishing WoK was unsatisfying. The fact that they have been.. well, humazined now, makes me look forward to a family reunion in the next book - which has disaster written all over it.