That doesn't read like she hates the character, only her own mortality. Besides, it predates the announcements of the new movies and, I believe, statements that she was interested in doing more movies.
ETA: I just re-read it. Yeah, she definitely is not bitter at the character or being associated with Leia. She's lamenting her own aging and possibly being reminded of her bygone youth everytime Leia is referenced. Don't confuse it with hate for the character though.
Agreed. I'm sure that with the right take on Leia, she'd consider it.