Regarding Death Note, with enough time for thinking since its end, in a way the less interresting 12 eps are fine.
Why?
Because they allow for the badguy to be less attractive.
They allow for us to see how he declines and become less and less smart, becomes more and more crazy.
In a way, in the 25 first ep, we get to believe (story wise) Kira/Light is becoming a God, everything folds nicely up to that point.
The latter eps are here to remind us no man can become a God (they say there is an execption born something like 2 thousand years ago...)
Anyway, I'm going to watch the director's cut ep. It seems the end is different.