Thank you for posting this. I'm a big fan of hers - in fact, only yesterday mentioned one of her books in a critique on a thread on here. I'm sad to see this, but she certainly had a long and prolific career.
There's a lot of things I love about Tepper's books: the ambition, the scale, the inventiveness, the living breathing female protagonists. There were strong views underlying her books, and I think some found that off-putting, but for me it was a big plus that her books were so informed by her ideas about the environment, religion, population, gender - they were probably more about politics than technology/hard science. She had a wonderful feel for nature - the landscapes and creatures of her books were so well done. She also had a lot humour in her writing.
My all-time favourite is probably Grass, an absolute classic. Although it's one of her most famous I didn't like The Gate To Women's Country much - I remember it as being rather simplistically polemical, and wonder if it might actually put some people off. So many great stories...