"Stay as a team feature"
I have been playing a bit of Overwatch lately and one thing they added in the last patch is a feature that I think would be great for normal 5's: The ability to stay grouped without adding people. At the end of a match (for those who don't know), you can click a "stay as team" button and however many people hit that button.. stay as a team.
Now I know the matches in OW transition faster, but it would be nice to auto create the next lobby with the people who want to stay grouped.