I don’t recall Jane being an especially great actress.
China syndrome was entertaining but it was hardly a great movie with great acting.
She still looked good in the 1980s though.
She was a sexy young woman - kind of a really dirty WASP. She was very good in Klute - her best performance. I do think she is enormously overrated. All her 70s pix were offered first to Barbra Streisand who turned them all down. She later said to Fonda: “You owe your career to me.” Two bitches who can’t get along despite sharing the same politics!