Based on those comments, Michael C. Hall and co. realized that the issue wasn't about how Dexter ended, but rather that they didn't want the ride to end. Fans' appetites for this franchise are still signficiant, which is why we now have Resurrection and the prequel series, Original Sin, which will be returning for Season 2.

Resurrection has multiple murder investigations going on at once. The narrative is as interwoven and complex as a DNA strand — but somehow it all works.