No offense Lob but your "helping Briala prolong the war helps the elves attain freedom so it's worth the many who will suffer and die from it" stance banks on humanity's generosity in letting them be and I doubt once it's learned two elves prolonged their suffering for personal gain they'd be inclined to look kindly on them.
Ending injustice now so it isn't an issue for future generations is my stance.
You're welcome to disagree with it, but I'm not inclined to change my mind. When the opportunity arises to irrevocably change the future for countless generations for the better, I would prefer to seize it.
Of course, some humans will take issue with the elves having freedoms (which was also an issue for the elven Bann in Denerim), but I don't think it's sufficient for me to forsake helping an entire race simply because some racists are going to have problems with elves having rights.