If the scenes had involved a character dully writting names into the Death Note, with no music and a still camera, with no effort put into the camera angles, do you think that would've been good? What point would there have been in adapting black and white pages and not adding anything!?
For me, as I've told you before, the music and camera angles added A LOT to my enjoyment. Because Madhouse did what they did AND tried to fix the last half of the story, I rank the anime higher than the manga. I can't imagine Death Note without the orchestral score and camera zooming around. It's hard for me to understand your issues with the anime when I love the anime for what you hate.
Ayase raises a good point when he mentions the part of Death Note where Light goes to the trouble of setting up his drawer so that if anyone tries to force the false bottom open it explodes. It was never mentioned again once it was explained, but it wasn't pointless. When he was testing out his theory in an abandoned building before building it, he casually told Ryuk that, if push came to shove, he'd have to kill his own family, which showed how little Light cared for anyone; even his own family. Then, when he was explaing exactly how the trap worked to Ryuk, it highighted how intelligent Light was to be able to protect the only thing that, if found, would destroy him in an obvious place and easy to access place. Both the testing and explanation of something that would never be mentioned again helped give further insught into the mind of Light - they served a purpose beyond simply over-explaining a trap.
Also, Light wasn't corrupted by power. I'm getting a sense of deja vu here because I sent a lengthy message in the direction of Ayase (which the ****** never answered) explaining why I've never viewed him as a good guy who was twisted by the ability to kill.
It's true that the Death Note gave Light the ability to go beyond the limitations of his life as a good guy, serving the justice of the world by catching baddies and putting them in jail, but Light was never what society could consider to be a good person. Do you think simply killing people made him not care about even his family? Do you think Light had no true friends before he received the Death Note because he was a normal person; no girl he had feelings of affection for? No, no, no. His IQ put a wall between himself and others, making him views those around him as lesser beings, and he masked his lack of caring for anyone but himself by acting like 'White Light', using his looks and social skills to fit in.
Power didn't change Light as a person - it allowed him to be true to himself; to free himself of the chains human society wrap around every individual to control them. Without the tool of the Gods he would've been forced to live like his father - rising to the top of NPA, making a name for himself as a hero and then retiring - but with the Death Note he didn't need to live his life hiding under a mask in order to protect himself.
Lots of people attack Death Note for it having no character development - for the characters starting out complete. I'd like to ask those people how they would've added development to a character like Light, who cares for no-one and thinks of himself as superior to everyone. Light was who he was, and that's why he's such a character.