It's not really their fault. They tried to have the same release date as PC but they have to jump through more hoops to get it released through Microsoft. We have no way of knowing what kind of problems and when they knew they couldn't release on time. My hunch is they knew recently that they needed to further patch the game, as there was a small update patch for PC but that small update patch for xbox would have taken longer to release, so what they are saying is true, you would have been stuck in limbo until that other fix was released. It's simple, Microsoft certification process complicates it.