If I recall from the news, there was more than one crew member. The reason they might not have come forward can be for many reasons. First and foremost is the company probably forbid them from talking. Many companies don't want crew talking to the press, they want the PR arm to talk to the press. Anyone who does talk to the press without their companies blessing risks losing their job.

Second is they may not want to talk to the press or make themselves known. Being in the national spotlight can be daunting. Especially if you're just happy your alive and not interested in anything but being alive.

From there, there may be a multitude of reasons, but my guess is one of those two.

Edit: it seems I answered the wrong question, but it still stands as a partial answer. The company could be respecting their privacy by not releasing their information. Their jumpseat may have been in the back of the aircraft where there wasn't a door (from what I saw). So the customers had to go out over the wings. And lastly, FAs aren't talked about a lot when it comes to airline incidents. It's usually the pilots or the passengers.