It's a mix. Sometimes solo, sometimes with a sound mixer. We always send two usable channels to the FS7 but sound mixers record ISO tracks as well. Those are sent to audio post in case they are needed. Vice News actually sends every piece in the show through color correction and sound sweetening after editing.
On the downside, it draws 13W of power (unnecessary unless you need to shoot raw or pro res) and adds quite a bit of bulk to the camera.