It is definitely possible for Haures/Flauros to make herself known as the Morrigan to many people. When I talk about her in groups on social media, I mention that my UPG (Unverified Personal Gnosis) that she is the Goetic Demoness Flauros. I do this so I don't get roasted or kicked out because some people (who are long time devotees of the Morrigan) are so absolute that she is x or y and are not open-minded enough to consider another option. So I put it out there for them.
I have read one post where a woman mentioned that the Morrigan came to her in a dream and had the blood red hair and eyes, fair white skin and thin build (this was in a Morrigan group on the Net.)
The way the Morrigan first showed herself to me was in a crow form. It was a vision. I was lying in bed, trying to nap and was very relaxed. The room was dark, but not pitch black (it was daytime.) She appeared in my mind, cocking her head this way and that the way birds do, as if examining me. Her eyes had a blood red tinge to them, but you could still see the brown pupil underneath, that crows have. She had the sharpest eyes I had ever seen on anyone. They missed nothing.
I have not seen her in any other forms since in visions or dreams, but she comes to visit me here and there.