My conclusion about the sixth season is that though it is a little better than five I know that this show can still do a lot better. It is a shame they did not go for a more refreshing story but instead safely followed their formula, which overall makes for not a very outstanding season, even being a little predictable. The season will probably be remembered by fans as that mediocre religious season, but mostly it will be remembered by the daring cliffhanger it had, which hopefully brings us a brilliant seventh season next year.
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Note that the 9.0/10 is for this particular episode. I'd give the season as a whole a 7.5/10 (which isn't good for Dexter standards in my opinion).