The Last Guardian's trademark in the US has been abandoned, but it appears this was due to an administrative error at PlayStation America, as Sony has confirmed to GameSpot that the project is still in development.
To me, him being gay didn't add or took away anything from his character. And I don't think he needs to be labeled as a representation of anything. He's just Dorian. I liked him because he was a charming bastard and his banter with the others was great.