I am not sure. I mean, I do not like them, so I am fearful of assuming they have NO good qualities - afraid of my own prejudice, I suppose!

When Miss Bingley asks Darcy if Elizabeth's appearance has affected his opinion of her 'fine eyes,' she is not supposed to have been heard by any but their own two selves. But if Mrs. Hurst did hear, or guessed because of Caroline's momentary confusion that the whispered remarks did not answer, Mrs. Hurst jumping in there might be covering for Miss Bingley. Mrs. Hurst might even have suggested walking with Elizabeth to give Caroline some time with Darcy, although it is apparent that each had no idea the other was going to choose a walk as their social activity.

If Mrs. Hurst is helping Miss Bingley win Darcy, perhaps they DO have affection for one another. Maybe Caroline helped Louisa catch Mr. Hurst, and they enjoy the flirtations and maneuvering of society together. Darcy would just be more of the same.