It's really fascinating seeing people talk about The Masked Empire, but also a little frustrating. TME gives so much insight into the histories, personalities, and motivations of so many characters we encounter in Inquisition (Mihris, Gaspard, Celene, Briala, Michal, Imshael, etc), as well as tons of much-needed backround information to areas and events we influence (the Orlesian Civil War; the power struggle between Celene, Gaspard and Briala; the history of how Michal and the demon Imshael came to be in Emprise du Lion; etc), but if you didn't read the book, you get none of it.
It's a shame, really. Briala is my favorite character from TME - she really cared about the elves, went through such turmoil and hardship, tried so hard to put her faith in Celene even after Halamshiral, and discovered what happened to her parents - only to risk it all in dedication to helping the Orlesian elves, and even extending a hand to the Dalish as long as everyone was treated equally. However, you don't really get much insight into the character, or even into the massacre of Halamshiral.
I was surprised, given Briala's unpleasant experience with Thelhen, the warleader, and Mihris, that she might make mention of how different Lavellan is in comparison to the Dalish she encountered, but it's never really addressed.
Is it just me, or is BioWare relying too much on supplemental material? I feel that novels and comics should enrich the players' understanding of the conflicts and characters the PC encounters in the game if we so choose, but it shouldn't replace learning said information in the game. We shouldn't have to read the book to know that Mihris and Michal and Imshael were connected (I thought they were all random, unconnected characters who gave out fetch quests like any other non-cutscene NPC); we shouldn't have to read the book to know the histories, motivations, and intentions of Celene, Gaspard and Briala, besides the shallow and obvious "Celene is a skilled politician and player of The Game, Gaspard is a militaristic war-monger, and Briala is an underhanded rogue who wants to help elves."
I do think that the characters could have been more fleshed out. We really get little insight into them or their motivations, despite being tasked with the choice to support one over the others.
As for Michel, after reading about his initiation into the chevaliers (and their initiation rite in general), I had some issues with him. I would have preferred offering Mihris an opportunity to join the Inquisition, since she seemed to have no one, now that her clan was massacred.
If I'd known just how horrible Celene and Michal were to the elves...
Oh, I knew. And I figured Revas would know, too, since it's hardly a secret that the elven population was purged. I sided with Briala. I remember watching her final scene scene and thinking, "I remember Halamshiral."