Sorry for the late reply, but I just discovered the TV/Movie room in these forums!
Just have to say that the Dexter finale, and the whole final season for that matter, SUCKED!!!
They had such great things to work with, too. Batista had all of La Guerta's effects, including the VIDEO OF DEB GETTING GAS FOR DEXTER TO BURN DOWN THE CHURCH FROM LAST SEASON!!
The whole final season could have been a slow burn of Batista putting the pieces together, figuring out that either Dexter or Deb killed La Guerta, and then having the finale be about either killing him and escaping, Batista covering it up, or Batista blowing the whole thing wide open and having Dexter (and possibly Deb) go to jail, etc.
Instead we got a season that was about a "big bad", just like every other season, with no suspense building, and it just fell flat on its face.
Utterly disappointing and a huge waste of time.