Big Deck Poll 2: Respawn?

Respawn is exactly like a normal Free-for-All multiplayer game, except:

You can join the game at any time, picking a deck and a chair.
If you've been eliminated, you can rejoin the game (usually in the same chair), with the same deck or a different deck, immediately or later.
When you join or rejoin the game, you resolve any mulligans and immediately take three turns. During those three turns, you're in a "new player bubble"—basically, a separate solitaire game of Magic. Nothing you do inside the bubble affects players outside the bubble (or in a different bubble), and vice versa. You fully enter the game when you start your fourth turn in regular turn order.
If you want to keep score, here's Abe's system:
Gain 1 point each time you kill an opponent.
Lose 1 point each time you die.
If you voluntarily leave the game, lose 1 point. The last player to damage you, if any, gains 1 point.
The player with the most points at the end of the night wins.

I do like this, as we tend to leave potentially dangerous players in the game so they won't feel left out (well, I do anyway), and we tend to not knock players out early on because then they have to wait to get back in the game. This could make the games a little more aggressive without the drawback of someone waiting on the sidelines for an hour or so.