I agree with BOF, they know.
Don't listen to the Podcasts etc but from what I've read, it's been said that despite lots of new shocks, twists etc, a lot of the questions posed in previous series will be answered and haven't been forgotten.
If they didn't actually know what to do, with the vastly numerous unanswered questions, seasons 5 and 6 would be farcical as they tried to pick up the pieces and put them together.