First of all, Staten wasn't creative director, he was a writer and design director. Secondly, they explicitly stated that they do have a release date in the last mail sack.
Because he got a better job?
Thirdly, what does PlayStation have to do with "things probably aren't as rosy at Bungie as we think"? They're launching their new franchise on the most powerful game console ever made, the PS4.
Whoa whoa, relax, just a dumb observation lol.