They had the last chance to divert from the simpsons-formula where, by and large, everything reverts to how it was at the beginning of a season. They could have Deb arrest Dex, or let him run, or let Deb pretend she's the BHB, or.... but no, they bailed out with another lame a kill that fixes everything so the police soap opera with serial killer gimmick can continue. Horray for another season that will be the same as the last five
Yes, yes Deb killed somebody. Big woop. The show is about Dexter, and the formula around him never changed.