Casual queues pop around the clock, therefore the mode is fun enough to pull in people consistently even without a roulette to give PvE rewards.
Ranked is just dead in the water because there's nothing worthwhile beyond your first Season to push. Whether it's Series rewards, PvP currency, achievements etc. Casual is just way faster AND easier, especially to high rank players to grind.
Right now there's basically no reason for Ranked to exist, the level of competition keeps getting lower aside from the handful of people that have stayed active since beginning. Season 4 had LESS people in Crystal rank than in Top 100 on Light, it's that bad right now.
They really need to add more incentives to play Ranked or reform the whole thing. Going through the past PvP discussion there has been plenty of good ideas for general rewards or changes to the whole tier system (whoever decided on the star system? lmao). Hell, if nothing else they should at least give us titles for multi-top 100 rankings as stop gap while they try to figure things out, that would at least give something small to aim for the active regulars.
