When a teammate quits, why not adjust the amount of time it takes for the other team to spawn? You could make it so there’s always the same number of players by forcing spawning queues or just slowing the rate, at least.
Also, hi, I’m new to posting here, but very old to the Halo universe…I’ve just had it with quitters. It seems like there’s a quitter (or 5) every match and the team with less players usually loses for obvious reasons. I don’t like winning that way either. If you limit the number of players on the field that fixes the balance.