I think Blizzard could implement a feature in their Open Queue, let it be the upcoming Max3-Min1 or the regular one, like they did in Heroes of the Storm: give the player the ability to choose their preferred role. In HotS players can choose up to two preffered roles, the main one and the sub one, out of Tank, Bruiser, Melee Assassin, Range Assassin, Healer, and Support.
Also, some Profile Visibility changes would be welcomed, such as “display/hide rank and account level”, “display/hide top 3 heroes (this season)”, “display/hide current season statistics”, and make them switchable options so the player could regulate how much and what information about their profile they want to share with others.