My take: Marriage, gay, straight, whatever---doesn't inhibit storytelling, it changes it. If you're a good writer, you can do great stories either way. A married couple just opens up new kinds of stories.
Also, it seems that this was more about the Perez complaint than the gay marriage thing. Which is to say continued editorial changes at the last minute. I can see where that can get very annoying and stressful for a team. Life's too short to put up with that crap, especially when they can move elsewhere.
Achilles is the kind of evil that hollows out a volcano for a lair, and sends killer robots after his enemies.---Lord Simian