From a former game tester and huge fan of this game and company, forgive me if this just sounds like damage control.
You say your reason for releasing sotf on ps4 before SE was to test coding? Fine, seems reasonable. But that does not explain why it would not launch simultaniously on xbox, whos coding already works fine.
In other words, I see why the order of release is happening on ps4, I just havent seen a valid reason for a delay on xbox. Seems discouraging, as droves of people ran away from Bungie for going this direction. I am a gamer and love this game, but if it becomes a tinkle match between content one console gets over another, you will lose a large player base. We already dont get a lot of content and control that pc gets, if the consoles arent treated equal, it will set a bad future presedent.