I guess when I was 6 i liked it, and every generation needs it's time travel movie doesn't it?
But, no, bringing them back to contemporary 80s earth just doesn't work. It's sort of too close to home to be good. Star Trek is Sci-Fi, sure, but this just doesn't work.
They live in a future that COULD be, with it's own history, it's own mythology, and taking the crew of the Enterprise back to our world just makes them feel more out of place than the comedic tone of the film intended.