Ranked roles make games better. And it allow in battle passed or dota plus. This is the privilege that players get by purchasing a premium in any online game.
Ranked roles give you team mates who's already choice his lane, and players never fighting eachothers to get their role and no game ruiners from start the match. Players with this function have more chance to win every game. Because no fighting with team mates for role, no double mid, or carry, no throw under tower team mates by tiny etc. Players with this premium have a rly good previlegues in matchmaking...