My biggest issue is that "extinction is forever" means nothing anymore. I think it will lead into people no longer caring about the environment because if something goes extinct we could just clone a new one. I have no doubt that cloning extinct species will lead to a future like this.
Fair enough, although I would rather have select recently extinct species brought back than hold back.. I think it is essential that it is emphasised that cloning is not an option across the board and the environment and ecosystems need to be conserved even better than before.