CONFESSION: I like Morrigan, but I thought her involvement in the story was incredibly sexist. Her entire purpose in the plot is sleep with a male warden(PC if male or Alistair/Loghain) so she can give birth to an Important Male Character and be it’s mother. I wish her entire motivation didn’t depend on what’s between her legs.
Aside from the fact that there’s nothing wrong with being a mother, her motivation is to preserve the soul of an Old God — and to save the Warden’s life, assuming she cares about them.
She provides a link to Flemeth and her arc involves dealing with that — it’s not exactly an ideal mother-daughter relationship, but how many other games deal with or explore that dynamic at all? Her personal arc also dealt with maybe not seeing her emotions or relationships with others as a weakness. She had a wide range of thoughts, opinions, and conversations that had nothing to do with the subject of men, sex, or babies, so it’s not like that’s all her character consisted of.
Giving birth hasn’t hampered her in being involved in DA’s overall arc, either. In Witch Hunt, she goes to find an eluvian and explores the realm it links to. When we see her in Inquisition, she’s become a part of an incredibly cutthroat, decadent court for some time and has presumably held her own.
She’s much more than what’s between her legs, and she’s much more than a mother. Ignoring or glancing over all of her other character traits, actions, and involvement in the plot because she occasionally uses sex to her advantage does her a disservice, imo.