As a feature of the TI18 battle pass we could enjoy for a brief time a new mode called Ranked Roles where people had to choose what position would it play before queuing. This allowed people to train a particular role and more important eliminated all the fighting over roles diminishing the toxicity in DotA (specially in low mmr brackets)

Important personalities and communities from DotA have already manifested the numerous advantages of this mode and expressed their dessire to keep it as a permanent mode in the game.

Please Valve, help us reducing the toxicity and improving the experience in an already fabulous game.