A tutor system?
As we all know, all MOBAs are basically brick walls of learning curves with oft-outdated tutorials (All 3 of the characters in the tutorial were already reworked for crying out loud).
What if we could add an option to mark oneself as a "Tutor", and thus be matched with a new player to ease them through the game?
For example, a new player could be asked if they want help learning the game, and thus automatically send a "Friend" request to a Tutor, who can then play with them and teach them how the game works.