Not a whistleblower. She didn't expose any wrongdoing.
What she exposed was a lot of democracy activists whose lives were then in grave danger from their dictatorships. Luckily the US was able to rescue them all in time to save their lives. But now they are no longer in a position to help influence their country towards freedom.
But she didn't do that on purpose. She was dreadfully unhappy and lashing out at the world. So not a traitor either.
I do think it is appalling that she and Jonathan Pollard did not serve the same sentence. They committed similar crimes. There was clearly a horrible injustice with at least one of their sentences.