So, the book has shown Briala wanting a big elf group, could be beneficial for the Inquisition that Lob wants to take advantage of. Others may wish to squash it to gain favor with orlesian nobility. Eluvians or more money, choices, choices. Both seem legit.
I REALLY hope Briala gets some good screen time, and her rebellion won't be pushed to the next game.
Also, Bioware has built a very strong cast of characters since DA2, what with Celene, Briala, Gaspard, Chevin, Imshael, etc. What are the odds we get to execute the characters, like the freedom we had in DAO? Do you think our execution choices will be limited so BW can use the characters in a greater capacity in DLC or the next game, or will they overwrite player choices in the future, like with Alistair and Leliana?
Personally, I am all for exploring potential, and Bioware has built such a gigantic lore with so much history behind these beloved characters that it would be disappointing if they stopped developing the characters because players had the choice to kill them or not. Thankfully, this hasn't been the case so far, and they've already gone ahead developing popular characters, such as Leliana and Alistair, regardless of player choices.
...I think I answered my own question.