Merrill. A Disney Princess fan girl elf who uses blood magic with near zero consequence. In fact, (spoiler alert obviously) her
mentor who warned against blood magic is the one who eats it. For some reason. Then, even if her entire tribe is murderized by you all because of this blood magic shit, she still doesn't learn a thing, and no further consequences befall her throughout the story.
Nothing you do matters concerning Merrill, and her personality is designed with no effort to make a creative, human character, but instead is made to service fantasy fuel. Not necessarily bad, but for a series that prides itself on characterization, that's pretty horrible to make a character where their only purpose to exist is fantasy fuel.
Anders. They hand wave his death in the expansion and no matter what you do, romance or not, he blows up the citadel in a mad lemmings suicide chaos pact thing.
Nothing you do matters concerning Anders, and he exists solely to provide a false grey narrative before going full blown terrorism and shooting any chance of feeling empathetic for the mages.
Isabela exists solely to be the arbitrary slut and most things involving her are just sex. The few times it breaks away from this is to service a subplot for the Qunari, in some extraordinarily coincidental circumstances that I almost didn't believe when I heard it the first time. "You have
what? You've had it this
whole time? And you're going to damn the entire city because... You're a sociopath, I guess?"
Actually that's pretty consistent across all of them. Merrill has no lasting scars from slaughtering her entire tribe, Anders has no regrets about mass murdering thousands of innocents, Isabela doesn't give a shit about damning the entire city to be burned and murdered by the Qunari--nobody has even a remote hint of humanity in them. They're cardboard cutouts that service specific stereotypes, so painfully, that if you're even
slightly genre savvy, you slowly begin to realize what a soulless, vapid piece of crap it is in the writing department. Which is a shame because it did show great promise in Dragon Age: Origins, since all DA 2 had to do was run with all the established material and make something out of it. Instead it diverted away from all the established material to give us a dedicated mages versus templar conflict where the mages pretty much always
do turn out to be horrifying monsters.
Adding insult to injury, you rerun the same dungeons 6-7-8 times for quests that have similar themes, to the point that I sometimes forgot how far into the game I was and wondered if I had loaded back to the wrong save file.
The aesthetics are nice?... That's about the only compliment I have for it.