If you leave early, you don't get stats.
I'm stealing this idea from someone in another post, but I think the perfect way to penalize people for leaving a game early is to make the stats not count - no kills, no damage, no wins, no games played, nothing.
People who hot drop will think twice before getting 3-4 easy kills and then leaving when they're down.
Overall, it's a win-win.
1. If you go down, you wait to be revived or get respawned like a normal person.
2. If your teammates are garbage and don't revive you or respawn you, leave. It was a loss anyway.
or 3. Wait it out... In the off chance that your teammates win without you, you still get a win for your stats.
The time penalty means nothing. People will continue to quit because they're trying to "rebel" or something... idk. They think this is the way to get a solo mode. But right now, in SQUADS, you don't leave your teammates hanging because you want to farm kills. Instead, you watch for a few minutes out of your day and play like it was meant to be played. You're not going to handicap a team game mode because you want to play by yourself.