I always let Bethany join the Circle (or died once in the Deep Road) so...
Bethany is in the Circle in my main canon, and it's been that way for so long that I can't even imagine it differently. But... this is the one choice I'm still seriously considering changing in my canon. I don't want to send her to the Wardens, she's miserable there. She likes being in the Circle, and I like the sweet person she continues to be there better than the bitter, dry person she becomes in the Wardens. And the final scenes with Orsino when he betrays her are so precious. And changing this messes every headcanon I've built over the years.
But at the same time, having Bethany in the Wardens is also the only way I can even make sense of how in the world Hawke would be working with Loghain, of all people. I like what it results in, the Abyss sacrifice is the perfect ending for Loghain, but.... with my world state the way it is, Bethany in the Circle, Hawke having no contact with the Wardens beyond Nathaniel and maybe Janeka, why would Loghain contact Hawke? Why would Hawke be willing to talk to, leave alone work with the kingslayer who almost got her and Carver killed in Ostagar? Nothing adds up. I can probably headcanon the hell out of it, but this quest alone demands so much arm-twisting to make my DAO and DA2 canons work together.
That's Inquisition for you, destroying headcanons and forcing grudging world state changes everywhere. 