What no penalty for leaving a match?

This needs to be returned, I really am not looking forward to the situations I keep getting where I drop into a game and the enemy team is trouncing my team and I have no chance of bringing it back.

Halo 3 punished with ranking reductions and Reach stopped you playing if you did it too often, we need this back and we need it now. Why should I suffer as a player because the team I’m with feel like they can’t win and then give up by exiting the game and leaving those left outnumbered with absolutely no chance at all.

And should you sort this out you could also keep it as it should be with full games being the only games that start. None of this half lobby -Yoink-, especially when you have massive maps like valhalla.