Well, been awhile since I've seen one of these.
OP, I'm sorry that Cullen is straight and gated towards two races. It does suck, and this thread is a nice bit of proof that not all of Cullen's fans are straight/bi women. I do agree that there should be a gay knight in shining armor romance down the road. It's high time that BioWare does one of those, and I show my support when the suggestion for a gay knightly romance shows up.
However, I am very opposed to changing the sexual orientation of any companion/adviser in this coming game. It's a part of who they are, even if I don't like it. Shoot, I was (and still am, I suppose) a big Varricmancer. He's not available in any way, shape or form. I don't have the luxury of rolling another race or gender for the romance I really wanted. Yet, I'm not going to ask the DA team to change that because his lack of availability is going to play into his story, whether I like it or not. It's not a good idea in this case and sadly, it wouldn't be a good idea for Cullen.
I just think the idea of everyone being bisexual takes away from the individuality of each character. I like variety and choice as much as any American but if I wanted to manipulate everything in the game I would play SIMS. For realism's sake some npc's should have opinions and boundaries that cannot be crossed. DA2 lost me in the end because Fenris spent the whole game complaining about mages, was my 100% rival, and he helped defend Hawke (who was a mage). You can win over people but that just seemed ridiculous. Same with sexuality. Someone may be a little curious but not all men can go the Kaidan Alenko route of switching sides.
Okay, bisexuals do have lines that can be crossed. Please stop the idea like bisexuality is the half-point to being gay. It isn't. Kaidan nor any bisexual man just "switches sides." They were born that way. Sometimes, it can take folks well into adulthood to realize they are gay or otherwise not straight. I'd be happy to list some examples of celebrities that realized they were gay in their 50s and 60s.
The problem with say, Fenris being in love with a rival that's a blood mage or Anders in love with a staunch Templar has zero, I repeat, zero to do with whether or not they were bisexual. That was an implementation problem with the class and friend/rival system, and one that I suspect was yet another victim of the literally 12 months that EA gave the DA team to finish the game.
As far as "all bisexuals not being realistic," please don't start that falsehood. I've been speaking to a lot of posters on this subject for almost a year now, and you know what? A lot of us have had friends where there was either no one straight in their close group of friends, or only one or two straight people. Including me. Out of my group of close 9 friends, only 1/3rd of them are straight. That includes my husband. So, is that unrealistic?
You very well could have a friend, a co-worker you chat with, or family member right now that's either struggling with their sexual identity, or is bisexual and won't tell you. I know of a lot of bisexuals that are leery of coming out even to close friends, because of the pre-conception that they "switched sides" somehow. Or that they are "really gay and just don't admit it." Or they are "just greedy and horny." Or, if they are a girl, they "suddenly want threesomes." I could go on.
I'm sorry, but four bisexuals in all of Thedas, that happen to have met Hawke, is a little unusual but not unrealistic.