I think a problem Star Trek has is sometimes they put telling a message above making an entertaining product. Look at the Ferengi, they were designed to be villains that showed the dark side of capitalism, but they failed to be threatening. Have them hop around and act like monkeys well Riker stands tall and smirks at them isn't the best to introduce the guys who were supposed to be the main villains of the series.
I think some of the best Star Trek stories combine messages with good story telling, rather then putting the message above the needed story telling elements.
I think some of the best Star Trek stories combine messages with good story telling, rather then putting the message above the needed story telling elements.