Battleborn is a pure Multiplayer experience, therefore you, Gearbox have to ensure that the few people, that bought the game and have fun with it are playing even in a month or two or longer
so you have to update as much as possible with new characters, missions, skins, taunts and so on
but what bugs me the most is, why are there no daily challenges like Complete mission X or kill 10 players online etc. ?
that would easily motivate enough people to play Battleborn regularly, Rewards could be Gear, Credits, XP-Boosts for a 1 hour or something like that
please think about something like that and update the game as much as possible with new content, it has so much potential but if you don’t keep the players motivated it will be dead soon i fear…