Rachel Bennett, a television columnist at ScottFeinberg.com, wrote some honest and thoughtful analysis on what is happening with NBC. It is a really good read and it's one that I find myself in complete agreement.
Right now, Revolution has the ratings to be considered a successful hit. It's got the J.J. Abrams pedigree and was created by Supernatural creator Eric Kripke. It had the best ratings for a drama debut in 3 years. For a 10 PM show, it also had the best ratings at that hour since a January 2010 episode of Private Practice.
While some moves this season have been questioned, especially moving Community off of Thursdays, it's too early to tell just what kind of fall season that NBC will have.
I've watched the pilots for Go On, Animal Practice, Partners (CBS), and Ben and Kate (FOX). I can tell you that out of those four pilots, Ben and Kate is the best one by far. NBC passed on a Sarah Silverman pilot. I would have been interested in seeing what that was like.
NBC can get back to the heyday of the 1990s but what really hurt them was giving up on the 10 PM drama in 2009 by placing Jay Leno there. Also, by going unscripted for a while, they lost viewers to other channels.