There are still experiments taking place by the Dharma Foundation; at least they are dropping food supply make sure the subjects are kept alive for observations:
1. Human Behavioral Experiments. They are (were) being watched and monitored. The others and others groups all believe they represent the good. I say this again someone is watching/experimenting with group behaviors. They are just f&*(ing with their brains. There are no evils. Perhaps they are trying to find out why and how the human astrocities such as the 2nd world war took place. Good and evil are just relative terms from each others point of view.
2. Biological/genetical Experiments. What were the mysterious scary creatures that attacked the people during the first years? There are animals not indigenous to the island. They are brought by the foundation, the reason the others tried to still the babies and the child of the survivors explains. They are important subjects.
3. The island has a geological significance. The presence of crazy electro-magnetic field and the special energies that cures every known incurable illness i.e. cancer, paraplegia, infertility, i.e. that’s why the elaborate experiment was staged on the premises.
4. Paranormal Experiments. They are possibilities; however, I don't think it was the case. I rather believe it was mere coincident that would make the show more interesting especially how everyone there is intermingled prior to the crash. There are signs and guidance by dead. I believe that they were somewhere between illusions and just interesting coincident. This part I don't think it would be ever explained. The show will end in the way that it would make the viewers wondering what happened. THEY ARE JUST GOOD STORIES.
Conclusion: The road to the haven is filled good intention. Did I say right?
Survivors are just caught in the well intended experiment gone badly. Will they survive? It is totally up to the writers and also depends on how long the show maintains the ratings.
I would welcome any pointers.