Anyone who thinks Celene and Briala are in a "loving" and "good" relationship has very strange standards.
The same can be said about Morrigan and the Warden, Anders and Hawke, Anora and Allistair, and ect ect.
I read the book, and the abusive part is all tied up 'in the game'. There was also not enough detail given to make a proper analysis of the situation. Unless Weekes/ gaider elaborates further on the story. What is to say that, it was not, an impossible choice? If celene lost the game to Gaspard/Anyone else, it can be argued that the elves would be worse off...and Brialia dead.
Meh, a pre-qual to TME would do a lot to solve these issues.