I read somewhere that ABC is admitting that taking 13 weeks off was a bad move. It allowed people to drop their Lost addiction and realize that life goes on without Lost. They expect that the Lost ratings will pickup once people start talking about it at work again.
As for not answering questions, I think the show does answer a lot of questions! They just have a remarkable way of creating more questions for every one that they answer. Of course they can't answer all the questions... that would end the series!