If SE want more people play rank mode is simple. Just add a extra mode with duo/triple queue and extra rate for solo who queue duo/triple mode by themselves if they get stomp is their own fault for queue duo/triple mode by themselves.
Don“t even need some fancy reward. Serie reward/Exp is more then enough for bait casual people to queue CC and frontline.
heck we don't even get much reward with another online game fps/race car/sport/fighter/MMORPG pvp in casual mode mostly just gacha game.
