I'm all for daytime World Series games. Even with the 8pm starts, most of the games don't end until at least 11pm or later. There have not been many close games in this Series, so perhaps that is why ratings are down.
I guess there are many reasons for the lack of interest - attention spans of the computer generation, the saturation of sports on TV, the length of games. Although revenue is up for MLB, TV ratings are down.