Because it's not the spec he wants to play? I don't think it's too much to ask for the devs to bring the specs that are falling behind in line with the viable ones. In fact, isn't that the whole point of balancing? Granted it will never be picture perfect but it's also no reason for us to just be content with being pigeon holed into certain specs just to be competetive.
Too bad. You should be thankful that you have 2/3 good specs to play. Not to mention a Hybrid "trucker" spec is very viable and there is a whole thread about it in the PT forums.