@Xubunnytwo"As for TDM quitters issue, the best I could think of would be a penalty box (5 mins) for manual quits. Then immediate replacement of the quitter with a decent AI while they seek a replacement. This would grant the team some support while the new member spawns. Maybe also hide the score from them for 3 minutes to assure they stick around to help."
If they try a quit penalty there are several things that may happen. First and most likely, people will simply put the controller down and physically walk away for whatever amount of time needs to pass before the match expires. If they try an afk ban then people will put a rubberband around a thumbstick... and walk away for whatever amount of time needs to pass before the match expires. In my experience there is no way on earth that punishments create able and motivated teammates. These players are already being punished by what they will perceive, rightly or wrongly, as cheating or by very, very bad matchmaking. So "let the beatings commence until morale improves" is throwing gas on the fire, not water.
Replacing with decent AI has a few problems. First, I haven't seen anything in this game to date that would pass for decent AI. I haven't even really seen it in other games, though Halo's new bots are, in some ways, adequate. Even so, drop those in and see how fast the winning squad gets kvetchy.
Then: go ahead and try hiding the scoreboard from any player at any time for any reason. Instaquit. I guarantee it. And honestly, a player joining mid-match already knows exactly why they're there whether they can see numerical evidence or not.
The problem across the board is that players are looking for balance, fairness, and equity in their matches. In battle royale it can often take a lengthy amount of time to determine if any of those qualities are present in the match. Sometimes you don't know until there are only two squads left, and sometimes not even then. The game-killing flaw with TDM is that players know almost instantaneously if those qualities are present. And they react accordingly. And in my experience human psychology doesn't really allow for a bad situation to be remedied with punishment. Two wrongs don't really make a right, so to speak. Paid games used to be able to get away with it because they already had players' money. In an unranked playlist in a free-to-play game I have to think it's a non-starter.
This is why, imo, tdm is a dead format in any game.