They modeled her almost exactly after the cosplay of one of their employees, Jessica merizan.
It makes me kind-of nervous about calling morrigan unattractive since it now reflects on a real person and not just the good or bad job an artist did. With that said, I liked the earlier models and CGI of Morrigan better.
When did Jessica first do this cosplay, though? I'm sure that Morrigan has had this design for at least two years now. Did Jessica cosplay a fancy Orlesian Morrigan and then they designed Morrigan to match? Or did they design Morrigan as a fancy Orlesian and then Jessica, because she's on the dev team and had access to early concept art, cosplay the new look?
My gut is that it's the latter.
Unless you are talking about Morrigan's face, in which case, I don't see much of a resemblance between Jessica and Morrigan other than both being pale, dark-haired white women. The shape of their face, chin, nose, eyes, etc are pretty different.