That will take time, but they are well on their way to recovery. This past E3 alone won't do it, but they are set up much better than this time last year. As long as they stay humble and keep delivering good games, people will come.
Yeah, people looking for a complete turn-around are going to be disappointed. It's impossible. It'll be a slow ramp up over time if it does happen. They just have to stay on it and keep chipping away at it. It's going to be hard work.