it's a delay because so many people thought that's when the game was supposed to come out (despite how unrealistic it seemed), and turned out not to be the case. same as Tomorrow Children. they gave a weird nebulous year as to when it would come out but then kind of pretended that never happened and focused attention toward the beta releases, and now they're actually (sort of) talking about release window.
i mean, it's fine in the grand scheme of things, but let's not pretend MS is infallible and would never delay a game. i remember last gen everyone talking about how Sony was incompetent and MS would *never* delay a game because they had their shit together, but times change, and sometimes you have to push stuff back. it's okay, we're all okay.
i just can't wait until Sony gets ball deep into their new plan of only announcing games when they're much closer to release. if not for the shorter wait time, but also because time after time i get fooled into hype for a game because the unveiling/announcement gave me a much different idea as to what the game would be than what the final product was. announcing closer to launch could mean seeing in game footage much sooner.
ie: CG trailer showing wizards and knights battling each other with glorious lighting and music and sound effects, and then the game hits the cover of GI 6 months later and it ends up being a card game like Hearthstone or Magic the Gathering or something and i get disappointed. (this is a made up hypothetical example)