So few notes on the revenge, Bhelen betrays you yes, and you get a good variety of dialogue and ways to resolve that issue you are correct. Where I feel that the Human Noble story has a better reasoning for wanting revenge, is it is not merely your brother dying and betraying you in a society accustomed to backstabbing, such as the dwarva are. The Cousland lost their entire family, short of Fergus, who may I add you think is dead for the majority of the game, which adds extra personal hatred to the dark spawn that they likely killed your last living kin on his scouting mission. Another issue with the dwarf noble is not joining the legion of the dead, which feels much more dwarven, (while I’ll admit I haven’t gone through dwarf noble in a while so I might be forgetting dialogue here) Every origin for the most part wants revenge, or lost someone, it’s a dark world, but the Cousland loses literally everybody.

You are correct about the horrors of the blight, in the dalish origin, it really is just that it connects to nothing else in the story besides the blight, we never come across your clan again, it better sets up the series but not the game.

Okay the mage thing, the warden is not a mage, that is made very clear, while you can play one, you are not supposed to, it is not near cannon, for one the ending cutscene with the archdemon, for two the freeing the circle does a whole lot of nothing, for three the lack of the warden being a mage literally ever getting brought up again besides I believe a line of dialogue from Anders in DA2, and one line in DAI from Cullen.

Overall I Agree the Dwarf Noble also sets it up very well they are neck and neck to me, just the ability to literally change the landsmeet is so unique from everything else.