What's wrong with predictability? Predictability only becomes a problem when your work is too fucking long by half.
I enjoyed the final season, track back far enough in OMITT you can find me saying so.
But for me it was a problem they abandoned the show's thematic conflict, the struggle between a brilliant, charismatic, treacherous, awful criminal and a stupid, unpleasant, honest non-criminal—Hank, a man such as Walt could have been—in favour of the dull and by that stage, exhausted Oedipal structure of Walt and Jesse's relationship.
By doing that they showed they didn't properly care about the show's whole premise, which was like Crime and Punishment, exploring the fundamental problems raised by the imperfect will to power. So although there were plenty of highlights in the final season, I didn't really like it.
I felt the same way about Mad Men. When a show forces you to explore a particular idea for season after season, it needs to pay its dues to that idea in full when it concludes.