"The reason that cliches become cliches is that they are the hammers and screwdrivers in the toolbox of communication." Guard!Guards! by Terry Pratchett
Dystopian novels have to represent the human fears about the future. And usually those fears are very similar in each individual. So we basically have and idea wrapped in a story. And from book to book the idea remains but the cover changes. Sometimes the idea is that we fear the changes we see in our government. We guess the possible outcome of these changes and create a story about The Party that controls every aspect of life.
What I was trying to say is that people think and fear similarly so the outcome might seem as a cliche, which is ok by me. As you can see from my quote.
Perhaps it is the idea of the dystopian novel is the cliche. Each is unique, yet there seems to be an abundance of the subject. Personally I am just happy that the romanticized vampire flow has been decreased thanks to the dystopian novel.
I'd say they are prone to cliches, but the dystopian genre in itself is not a cliche.