It seems his philosophy really did best when others contributed to it (i.e. Gene Coon in TOS and the team led by Michael Pillar on TNG). Which kind of circles back to IDIC doesn't it?
Agreed. I know season 1 can be pretty preachy and finger-pointing at times, and the cast is pretty whitebread until you get to know them, but I don't attribute that to Roddenberry's ideas about an enlightened humanity. I attribute it to how his ideas were implemented.
Besides, the first season of most TV series is usually pretty shaky.