Exactly. Remember guys that the new Omega definition means that typically only one power is Omega. That doesn't mean a jack of all trades like Monet isn't useful. Heck, I'd say Monet is useful in a lot of situations that Iceman is not despite him being Omega.
Actually, Iceman is gay and last I checked Storm is a woman of color. If you meant who else among women of color and LGBTQ could also be Omega then I'd agree, probably no one else at the moment. But that can change whenever the writers want. This new definition is brand new and I don't think the list shown was meant to be ALL omega mutants.
Does Magneto count as a white man when he is Jewish? That should be another minority. I think the list given was decently diverse.