Additional Incentives to Play Unpopular Roles on Team Builder
Problem: There is still a constant deficit of certain roles in team builder.
Solution: To increase a desired behavior, add an incentive. An obvious example would be to give extra ip after the game. Maybe a flat 5-15 IP or an extra 5%-10%.
This would almost certainly increase people filling in team builder.
PS: I want to put this in the right place, but I wasn't sure where it goes so I made an educated guess. If it belongs somewhere else please let me know.