The modern Battelfront games aren't at all geared towards single player experiences (the 2017 game has a campaign but it's just not very good and arcade mode as you say isn't a thing I would want to play other than to test things out with).
It blows my mind that there hasn't been a single recent triple-A game release for Star Wars. There is the Respawn game, Jedi: Fallen Order, coming in 2019 though. So let's hope that's a sign that we'll see more of that. I'm totally fine with Battlefront being completely multiplayer if we get other games to scratch the single player itch.