One could argue that adding a male Arkana goes against what story/lore says. As in the "Story Thus Far" part of the official website it claims that males weren't suited for being used in the Arkana project and would have made for less optimal results in comparison to females. If you would like to read what I'm taking information from here is the link:
So if they were to add a male Arkana in theory wouldn't they have to make it not as powerful as the female ones so that they stick to the story they have made for the game?
Male class is already confirmed for the Korean version of the game. It however is not confirmed for the Western version.
That being said, the Lore does indeed allow for males to be added. If you read the Lore, it mentions that there were
male subjects, but they found female Arkana to be better in their experiments. But the fact is, there were male Arkana made. That information would still be somewhere in Mother's databanks.
The lore on the Korean website for the Chaser preview talks about the "old project being revived" because of how poorly the war against the Narak is going.
All it takes is a quick look around the Queen's Blade website, and to the previews for the upcoming updates to see that they're working on a male class.
The only real reason people are so against a male class, is the fact they do not want to see a scantily clad male running around everywhere.
Personally, being a straight female, I would absolutely love to get some fanservice for once. Although I love my Shadow Walker, I really like the idea of having a half-naked male toon. Yes, I am a pervert.
I would link the past discussions, where the Aeria GM's confirmed the knowledge of a male class when writing the existing lore, but those threads were removed due to the heated arguments that arose between players that want a male class, and the players that don't.
There are also rules restricting information being posted.
But yeah. Google Chrome's translate feature + google search or just to straight to the Queen's Blade website, and stuff isn't hard to find.
On Male Nudity
You don't even get to see women's genitals in this game. Do you really think they'd let a male's sausage hang out? No. There would still be at least some sort of underwear/boxers. There has to be something covering him up, and it would have to be way more substantial than the way females are covered at the moment.
@OP. You bought AP, which can be used in any of Aeria's games. They're not going to refund it to you just because they expanded the content of a game, and you didn't happen to like the content. Threatening to quit their game isn't going to do anything either.