Some folks have been critical of the final third of the series when Near and Mello appear with folks believing that they lacked the intrigue of L in his cat-and-mouse game with Light and that it was a big cop-out just to set up Light's downfall. So let ask this question, what if the series ended when Light had won against L? Would the series have been better to end at that point by having a villain win the cat-and-mouse game?
@cfatalis: The resolution in question being Light wins the whole cat-and-mouse game which was the core focus of the first two-thirds of the series. With L out of the picture, the series becomes less intriguing with Mello and Near because they are working off what L discovered and makes the series feel typical because you actually knew what direction the series would be going whereas Light and L going off each other made things unpredictable enough making one wonder who would win in the end.
The series is perfect the way it is because if Light would have won it would be the "Oh, the villain won and the world was destroyed, ok moving on.." After watching all of that and having to use my brain to get through the series (You got to admit, the series is quite witty) I would prefer a more happy ending. Sounds Cliche, right? Well, the way the Anime ends isn't all peachy either, as it is.
Well this is an interesting quesiton but what would really become of the series after that? Who would even try to stop him anymore since everyone left in the world would consider him a good god of judgement?