I am absolutely for diversity in comics and in media in general, but I find a lot of the forced diversity a bit offensive because too often it's used to add a sort of shock value for talking points, or as a stilted marketing ploy. For example, when we found out that Batgirl's roommate, Alysia Yeoh, is transgender, the entire setup was silly and clearly designed to cause media buzz.
It seems like the character exists ONLY to be different and to add a "freak show" element to the story. Why does it have to be a shock? I get that people are very often hesitant to come out, but I think that the way it was done here, the way the panels are set up, it looks like a soap opera. The story was all over mainstream news sites as a big move for DC and it created a lot of hype. I don't like it when publishers take a group and use them to generate sales. I'd much prefer a character who is written to thoughtfully represent the group being portrayed and that speaks directly to them, rather than making a scene of them. The characters that speak most effectively to people are ones that they can see themselves in. I really like the way Scarlet Spider's buds in Houston, Dr. Meland and Officer Layton, are portrayed as a gay married couple. The fact that they are gay (and married) is not pushed as a way to generate sales, but as people really are. Dr. Meland and Officer Layton are involved in a strong, supportive (non-stereotypical) relationship and it's really refreshing. The reader finds out that the men are a couple almost in passing and it's no big deal, like it ought to be. Their relationship is not marginalized as much as it is cleanly woven into the narrative of the story. I really want to see more minority characters presented in a non-stereotypical, non-forced way that focuses on their story, not just on their differences.
With that said, I'd really like to see Justice League 3000 be a lot more realistically diverse. We need teams that better speak to the reality of society today. We need less of the teams like the classic Avengers (which I do love, but they're pretty dated) and Justice League (The black DC characters are pretty weak in my opinion. They need work). Also, as an aside, I agree that we need to stay away from caricatures like the huge bruiser, street-smart black guy and the mousy, computer expert (or ninja) Asian. It's silly and offensive.