The big difference is that you were able to get out of your ship and land inside the opposing team's base in the old game on the OG Xbox and PS2. It's not unlike the space battle maps from the original Battlefront 2 that Pandemic made more than a decade ago. Homefront is a mod dedicated to improving the gameplay of Star Ward Battlefront 2. One of the new Star Wars: Battlefront 2 modes was demonstrated a short while ago, where we got to see how the action moves in and out of large stations out in space as players attempted to complete various objectives within a set amount of time. Gaming Live Star Wars Battlefront II : Starfighter Assault. or in the case of the Clone War era factions, each side will either have to attack or defend. In some cases the Rebels will have to complete objectives, while in other cases the Empire may have to complete objectives. The Galactic Assault centers around objective-themed scenarios where players attempt to work with their teammates to complete objectives while engaged in either space dogfights against opponents or ground-based battles.
As you can see, the list is quite extensive, featuring a total of 11 different maps that will allow you to participate in a variety of different game modes, including Galactic Assault.
The list of maps from the various modes were posted up over on the official EA Star Wars Twitter account.