I remember how Tom Chilton explained why we had SoO in Pandaria so long. He said the 50% increase in staff members made things go slower than expected and that SoO was running 5 months too long and he was sorry. I don't recall any explanation why Hellfire Citadel is running for 12+ months and no other content. Did I miss it? If there was any, please link it, I'm really curious.