If you ask me, i don’t think its needed in Warzone since it’s 12 vs 12 (24 players) and Join in progress is enabled in Warzone. So i at least don’t notice anything if someone leaves. Arena is a different story since its 4 vs 4 (8 Players) and Join in progress is off.
It’s a tough call. On one hand, quitting should be discouraged as often as possible, regardless of game mode, on the other, Warzone is a casual playlist with JIP. Maybe some sort of punishment should be enabled, but it should be less severe than in the Arena playlists.