"There are no issues with the game development. All of the information was in the press release, the only reason for the delay is to release on multiple platforms. We usually release all of our platforms simultaneously (aside from PC). We've made special exception sometimes in the past but it's definitely just on a case by case basis and not our standard practice. In this case, Ubisoft recently decided they wanted to release the game on multiple platforms so the decision was made to launch them all at the same time rather than separately. I know it's not an elaborate, 'convincing' answer, but it's the simple truth." - Ubisoft rep