Enterprise only got canned about two years ago, unless times have moved on signficantly in the last 24 months, they could have adressed it then.
Dystopian Sci-Fi is a dime a dozen. Trek's Utopian ideal is one of Trek's defining attributes and has never been a detriment to the show. Utopia's need to be sustained and they are not taken for granted in Star Trek. Quite the contrary.
The fact that there has never been any "exploration" in to homosexuality in the 24th century beyond two hot chicks briefly kissing is a major cop out really. Equality is a big part of the ethos of Trek so to blatantly avoid it on a show like Trek is not about simply not pandering to the Gay Agenda but to avoid a huge aspect of society that should have been addressed. Practice what you preach and all that.