She is a great example of an award winning author whom I find unreadable. I've tried. Perhaps it's the lack of a sense of humor. Or the extreme pretentiousness.
Which certainly doesn't disqualify her for awards. If you follow the awards (say, the Man Booker prizes), you can only figure that the judges, at least, have great senses of humor.
Only my opinion. Doesn't count for anything except what I will buy or borrow. No sir.
ETA: I can't see her as an SF author. She may borrow forms and themes, but that is different.