Campaign: It's an okay story, we follow our main character from the ending of the Battle of Endor to the Battle of Jakku. After that, there's a little bit that happens during The Force Awakens and the first minutes of Last Jedi.
As it is, the story is very inconsequential, it doesn't add much to the lore, other than we see a couple of mission referenced in one of the movies and one of the tv shows. But the characters and their arcs are very by the numbers, and the only reason I enjoyed it is becaus I love Star Wars, I love Luke (and he was treated better here than in the sequels) and Kylo Ren was actually menacing. Other than that, the game has not much to offer.
Now, leaving that, the game is pretty FUN. The Arcade mode is really, really fun. And I suppose online is when it gets really amazing, sadly, I haven't played that mode yet, but you can see the potential there. And witht he update (that is basically, all the DLC content you can ask for) makes this a very enjoyable experience, can't wait to (finally) meet with friends and play this game.