Even bigger than it's predecessor
The story is based around your character who is voiced by Temuera Morrison (that guy who did Jango Fett in SW 2). It starts off at the beginning of the clone wars and finishes up at the end of SW 5, all that time it goes through the clone wars, the fall of the jedi, the rise of the empire and the birth of the rebellion, and THAT is just story mode.
Freeplay has also been worked on, the ''Galactic conquest'' has a completly different layout, it looks like a galaxy with planets everywhere and fleets of ships.
All in all this is better than it's predecessor and has set a new standard for this type of genre in Star Wars games.