Ever had this? You finally get matched up with a group of players, pick the mission, skip the mission intro and suddenly someone disconnects.
Now, due to this game having a somewhat neat system of drop-in/drop-out for missions, the game still treats that disconnected player as a person in the lobby, which needlessly extends the wait time for everyone else who has chosen their characters and are ready to start.
Suggestion: if a disconnected player is gone longer than 20 seconds, permanently remove them from the mission server and allow the rest of the players to get on with their fun a bit quicker.