Ways to improve the movie: Death Note, light up the new world.

So I just watched death note: new generation, and death note: light up the new world.

New Gen, the prequel episodes were actually pretty good and had things hinted at, that I was looking forward to see in the movie.
But the movie didn't deliver, some things were good, but most of it, went horribly wrong.

Here's some ideas I had to improve the movie.
(This coming from a real death note fanatic who basically memorised all the death note rules)