It seems to add no dramatic nor realistic effect to have every scene grimly dark so one cannot see half the faces; nor does it enhance ones ability to identify with characters. It has to affect the ratings. The head guy at CBS mandated that all the shows get lighter visually: CSI, especially CSI NY (it was that metalic blue green hue that is so cold and forbidding), Numbers (likewise). They are much more watchable and it is easier to care about the characters than they were.. I am not sure why I should be impressed with the Studio 60 characters tribulations. It is already a walk of life I don't have much contact with, they seem awfully spoiled and taken with themselves and furthermore they skulk around in the shadows. I'm not the favored demographic but like 'South Park', 'Earl' and watch Comedy Central regularly. I love each of these actors but you have to make it more inviting instead of keeping me outside so they can have their ongoing inside (not too funny) joke. Don't want to include me then maybe I don't want to belong. I will wait it out but am getting bored.
Maybe they also need some real comedy writers to make me believe it is a Saturday Night live kind of show although I have to confess there were times that SNL's skits were a labored as these but those skits need to be a little more funny and less pretentious to be believable.