The show has definitely been getting better. I was almost ready to drop it after episode 3 but kept with it to see how it went. I'm now somewhat glad I have. I can echo the sentiments about Studio 60 as well, I find it's one of the shows I anticipate most in a given week. Kidnapped didn't hold me, I like Sisto a lot but the plot didn't pull me in enough to devote an hour a week to it.
Heroes will finish out the season, although not necessarily on NBC. They re-run eps on Fridays on the Sci-Fi channel and it might fit better there as long as it's not too costly.
As for Vanished, Firefly and John Doe also ran on Friday nights on Fox during baseball playoffs, it's the kiss of death.