I think fans are really convinced the writers have run out of ideas. I really do think that some of the viewers could write a better script than the professional writers. The previews show that Dex is on a road trip to somewhere out west to where Trinity's son has movied. Apparently there are some unsolved murders. AND Dexter's older brother is now his guiding hand, not his dad.
IMO it's just too much rehash. Trinity issues again, the Ice Truck Killer (Brian) returns in Ghost form. IT's too much of a blast from the past. Move on. We have seen enough on the Ice Truck Killer and Trinity. I'm not feeling all the rehash. I would like a new, inovative, intelligent script that isn't full of holes, old characters, and red herrings.
There is also speculation from fans that there may only be another 2 years of the series left. I hope that is true.