Multiplayer needs:
- Bounties like in SP, where you can bring the target in alive with the gang chasing you
- The ability to challenge other players to a one-on-one duel
- Horse racing, and you can use your weapons to "cheat"
- Siege, where you and your posse can hole up as outlaws in any of the gang hideouts or towns and take on consecutive waves of lawmen (hardcore mode - if you die, you can't respawn into your posse until the next wave starts)
- Poker, Blackjack, and Liar's Dice MP tables
- Random events like in SP (stop a villain from killing a whore, escort and protect a lady from bandits, etc)
They need to concentrate on making Free Roam a better "living world" experience, because that's where everyone's hanging out - no one's really playing any of the standard MP matches.