While I don't disagree with the thought that Ford needs a car here, and it sucks to see them kill a great care like the Fusion, the problem is that you can't keep it around just to have something to sell in a recession. If it isn't making you money now, it's definitely not going to make you money in a recession. Like akirby mentioned, folks won't go back to cars, they will go to smaller CUV's. The fuel economy difference isn't as great as it was before (you have to think percentage changes, not actual MPG numbers), so that's really a non-starter.
While I hate to see Ford lose the best sedan they've ever sold here, I think it's the right choice.