Fridge Logic: The author uses this method in order to adapt some talents and spells from the game, as well as to try and explain how the Fade works, among many other things like why two handed weapons are so freaking huge. The fact that characters end up in situations where such reasoning is required and all the explanations come naturally and become part of the plot itself is a nice treat.
Mary Sue: Raonar, big time. A political genius and god of war with unique, borderline lore breaking powers. Loved (or envied) by everyone. Works as the authors mouth-piece on things he think Bioware got "wrong". Further driven home when one realizes that the author uses the name Roanar as his screen-name on the Bioware official forum.
Nightmare Fuel: Kallian gets a rather strong dose of this when she starts to go through her calling prematurely, before Avernus's potion saves her. Thankfully, her memory is jumbled and she didn't really understand what the darkspawn wanted to do to her, so she got away without much trauma.
Ron the Death Eater: Bhelen is a stupid, pathetic idiot and so is anyone who likes him, as told in the long (looong) endnote of chapter 48.