It depends on what you want them to do. Yes, the two of them combined are not going to be able to fix the crisis that's sweeping the US and Canadian Auto Industries, on which Windsor depends. But they do work for their constituents, being present, helping with whatever they can. Did you know you can petition your MP with small-level grievances, and most of the good ones will try to help you, or at least point you in the right direction of the people who can help you?
When you're not in Government, you can't do the big things, but that doesn't make the small things meaningless.