For Coop:
Feature for joining games your friends are playing.
Some times I get an issue where I am leaving the combat area even though the game just started and I am fresh off the truck.
Maybe a filter system so I can decide whether I want to join a game that is in progress. I have joined a few games that are on the very last point, and I couldn't even get to spawn.
A checkbox so I don't have to click next match after match.
These are just a few things i've noticed while playing coop.