Unfortunately, Benezia fell to the indoctrination of Sovereign, corrupting her and leading her to become Saren’s second-in-command.
Matriarch Benezia is a highly-respected Asari’s figure even before Mass Effect, and her status is partly the reason Liara went off to live the solitary life of an archaeologist. However, it doesn’t help that she’s the daughter of one of the most revered Asari of her time. Thankfully, Liara doesn’t have to worry about that. Second and more important, this increases the chance of an Asari becoming an Ardat-Yahksi, which is essentially an Asari who kills everyone they mate with. Firstly, the Asari believe that this does nothing to advance the race as a whole. She’s the offspring of two Asari, a union that’s usually frowned upon in their culture.
Liara’s presence in the galaxy itself is an interesting one.