So yeah its pretty crappy when you’re in a 5v5 and someone leaves, but sometimes it’s not their fault. Many times I get booted out of a match before the game starts by the game, and I’d be pretty upset if I received a penalty for that.
Also, if teams become uneven in the lobby before the match starts, other players should be able to leave without penalty. It’s very difficult to be competitive in a match where you’re 2 men short, or even 1.
Lastly, I’ve also noticed that players become AFK during matches which also hinders the team A LOT. I just played a map where we were being steamrolled by a team (we were 2 men short…), and then when it came to deliver the packages, (I was defending) someone on the other team grabbed an EMP and proceeded to be AFK for the remainding 10 mins of the match, allowing us to win the match.