Or, because the film is part of a longer space opera (as was already pointed out in a prior post), the relationship you (and others) desire will pan out.
Perhaps due to the action that they wished to pack into the movie they decided to forego the Twilight-ish, drawn out, romantic angst that would turn off many fans (who wants to watch a girl or guy wonder if the other loves them while they are involved in dodging pew-pews from stormtroopers, or the light sabre of the de-riguer "Man In Black")?
Of course we could take the attitude that our popular culture should not be there for entertainment or even forgetting our miserable lives for a few hours but a constant reminder of why our lives may be miserable. I know that is how I wish to be entertained: Constant reminders of my white, male, middle class privilege.
Lastly: You want classic storyline that leads to romance, but what if that is not the intent? Do you need romance to make a good movie? Maybe Abrams wished to think outside the box, break the inane paradigms, etc... and just leave the romance out of what could be merely a good "Pew-Pew" movie.
We don't always have to conform to what the majority wants, do we? What if the (moral?) majority is wrong?