-You (Edge) will be given a ship (probably) fairly early on. It is called the Calnus (which is clearly a shout out to long-time fans of the series, and probably has some relationship to the Calnus of SO1 and SO2)
-The Calnus will serve as a base of operations for you and your party
-You will be able to fully explore the Calnus, and interact with your various crewmates
-You will apparently be given much more freedom to customize the ship, including assigning crew to certain living quarters. It has been hinted that you will even be able to assign Edge a roommate. (Reimi ftw!)
-While on the Calnus, your party will split up, and you will be able to engage them in Private Actions (a series staple feature) which will allow you to develop your relationships with them.
-The Calnus is capable of flying to various planets, so you won't be limited to the linear story that was so prevalent in previous games
-Vakkas D-79, a new cyborg character has been revealed as the 5th playable character