Not everything is included, but it's kind of split on whether or not that's considered a good thing. The base game doesn't include epilogue story The Answer from P3FES, but it was announced that it will be released as DLC at some point. Reception on The Answer is mixed. Also not included is the female MC P3P, and I don't think we have heard of any plans to include this. The female MC had some different social links, but wasn't otherwise a huge difference to the game. I don't really consider these dealbreakers myself, but I've seen a lot of people upset over this, especially with the $70 price tag they're putting on it.