To me, it seems like this leak undermined several ongoing investigations and hurt our chances of getting to the truth. (With this information exposed, anyone being investigated will have their guard up now.)
I wonder: what was she thinking? I imagine she must have thought she was doing the right thing (rather than leaking for personal gain). Did she think this information would not reach the public for some reason? It's clear she didn't like Trump. Was this really just a reckless leak?