The Dungeon already sort of gave up on the original design. Philip Price wrote The City and the extension mechanism that things were supposed to plug into, but The Dungeon didn’t use any of it. So it was a one-way trip… Except you couldn’t actually transfer characters, it was broken. :-/
You want to pick a new symbol for the gays, but you want to use a symbol that has no other meaning associated with it. Can’t use multicoloured arcs because that already symbolizes the rainbow itself. So by that logic, you can’t use ANY existing concept or image of any previously existing thing.
Dude, just be honest with yourself. The Gays give you weird feelings you’re not willing to examine.