Very interesting that they finally chose to (officially) severe Dexter's "code" as I assume that means chaos and unpredictable behaviour will ensue. The code has been his harness for many years, the only thing really keeping him from killing randomly to satisfy his urges.

The timing of this disconnect is certainly convenient too, with Mathews and Laguerta closing in on him. It's very clever actually, because they (the writers) can go in so many different directions now.

The most important mandate within the code is to never get caught. But if he isn't a slave to his code anymore, perhaps eventual surrender and execution is Dexter's fate. It's somewhat possible now and was pretty much unthinkable up until last night. If it wasn't for Harrison and the stepkids, I could even view this as a realistic possibility. But all things considered, surrender has to still be considered a longshot.

Another mandate was to only kill those who deserved it. But, again, now with the code gone, Dex could very conceivably turn into the monster we no longer feel empathy for (if, for example, he killed any or all of Deb, Laguerta, Mathews, or the witness who could put Hannah in jail). After all, he IS a serial killer. At some point, is the destination not for us to feel repulsed by this person? Maybe that's been the strategy all along - make us really like this guy and cheer for him... only to hate him as the story nears its conclusion.
It will take some solid writing and acting to pull it off. But I'm really curious to see how this plays out over the remaining 14 episodes. That's all that's left!!! Sigh.