Si Spurnier is a shitty writer overall, he is just shitty af no matter the subject.
That said he is doing back-up to Gillen and that means next to nothing.
Also Cry Havok, was shit and him purposely calling his character gay when she wasn't for publicity, this is said by him. Is that shitty book least of its issues, i never seen someone so completely ruin a good concept of a 'Suicide Squad with monsters' as bad as Spunier did.
But the real point here is that Image is creator owned while Marvel is not and he is not gonna have enough control to do jack shit to the character.
Personally i don't think he is any kind of homophobe or anything like that, he is just such a shitty writer with such shitty post-post ideas that ends in shit like Cry Havoc.