I think with what the show actually is/focuses on, realistically there would need to be a lgbt version added, its not likely to work just by adding in a few LGBT people. Its a dodgy situation though of course, and it feels quite wrong to say there needs to be seperation. But the whole show is about people swapping partners, really. If there is 0 chance of any attraction with a lot of the contestants, it kind of makes it pointless.
Could alternate years too, so people don't get too sick. One year, straight/bi people. Next year gay/bi people. Or remove bi from one of those..if it seems bi is being greedy!
But yeah, it it a difficult topic for sure. But the 'there’s plenty of gay people on telly already' reply is utterly shocking