I thought she was a good character overall. I can understand why so many dislike her or found her irritating in Origins, probably because they were romancing someone and Wynne sure likes to talk about what's right. I never had that problem as I didn't romance Morrigan or Leliana.
As a person and a mage, she tried to do what she can for the mages, I'm sure after her experience with Aneirin, she became a good mentor and helped a lot of mages in her lifetime. It's honestly not surprising that she won't be respected by many whereas idiots like Anders get lots of attention, that's how the world works unfortunately.
As some others said, she is one of the few sane people in Thedas and totally deserving the Spirit of Faith's power. The fact that the spirit wasn't corrupted showed the good inside of her. My character always respected her, so did I. Sad for her death but not sad for how she died, as she seemed content with it.