in Roddenberry's defense imo it is important to have something like that. Millions of scientists, engineers, doctors, etc are where they are because of Trek and the utopian vision it said was possible. Millions of people who were bullied or alone or looking for a role model felt like there was a good future out there because of Trek.
While as an adult I love all the cynical, dark movies and shows like Hannibal, GoT, Fringe, etc I do wonder sometimes if our entertainment has gotten way, way too "realistic" to keep the imagination of kids lost for an hour or two in a perfect world. The only two shows I can think of that are something Roddenberry would like are Once Upon a Time and Parks and Recreation, and the only movies that come to mind are cartoons and... ugh, the Star Wars prequels.