Even if she wasn't the right person (I don't know), all the worst elements of the site are going to see this as a victory for their awful behavior and it's going to get worse.
The people who attacked her with sexism and comments about her personal relationships. The people who supported FPH even though they were attacking people in real life and off Reddit, not just posting comments in their personal corner of 'discussion'.
She didn't do a good job of it, but at least she tried to stand up against some of the worst of Reddit.
I worry heavily that if the new person doesn't draw a clear line at the start things are going to get a lot worse in terms of hate/abuse/harassment.
EDIT: After posting this I saw Nilay Patel tweeted basically the same thing: https://twitter.com/reckless/status/619620964658245632