Just playing a game today, I had a notion that may appeal to players of the game, while increasing the number of Multi-player games.
The first thing is to increase the stability of multi-player games... That is a given and everyone want's that.
The 2nd suggestion is to increase the EXP gained from multi-player games by 1.5x or 2x, but only for players who finish the game.
That would give extra motivation to finish the games, as well as give players incentive to play more multi-player games. It's a win for WGT, and a Win for Players.