I see a lot of arguing about Star Trek's Message, and whether or not it is simply an action-adventure show, or whether it has some deeper messages about morality.
I think it is obviously doing both. Using an action-adventure story, aliens in makeup etc., to tell good a good story each week.
Many of these stories work because there is an underlying message, or point-of-view within each episode.
They are not all of the morality play variety, but many were, The Doomsday Machine being an obvious message about the dangers of nuclear weapons.
On the other hand, it was, and is, PRIMARILY an adventure show, with Kirk and crew outwitting aliens, androids, Klingons and Romulans, or some other exciting adventure.
The Wrath Of Khan was first and foremost, a battle in space between two very different adversaries, but had the theme of what happens when humanity tries to play god, Trek III dealt with the repercussions of a technology being perverted into a weapon, and both dealt with mortality and ageing.
Also, it was never a "preachy" show, and for the most part, explored the issues via allegory rather than making direct statements.
It IS more cerebral than Star Wars, Flash Gordon or Lost In Space, but in the end it was an action-adventure show with a lot of variety in it's stories and themes.
JJ Abrams sees the inherent optimism built into the promise, and with the crew's efforts to do their best, even against the greatest odds, and that makes the crew very good role models.
The optimism is more of a theme than a message, and the evolved nature of humanity was alluded to more than stated.