I really enjoyed this game.
While I admit I slowed the game down a few times myself I think a deadline with a points penalty for not posting in time mite motivate me and others.
Its just a suggestion but moving forward when a player is late and giving them strait zeros mite keep the game going but keep players in the game for future rounds. Something like this: If a player fails to submit by deadline the get a zero. If they fail to submit scores by deadline their song gets a an automatic zero and all other scores are bumped up a notch accordingly.
The game also mite be interesting if someone was eliminated each round like mafia.
I'll play no mater what the rules are. Arth you have been a fantastic Mod and in no way am I criticizing but I wanted to toss out some ideas if you are interested.