If I understand correctly... (Destiny)

by CruelLEGACEY , Toronto, Wednesday, December 16, 2015, 18:24 (3360 days ago) @ Kahzgul

the model you are describing is exactly what Bungie used for Halo's co-op campaign and Firefight matchmaking, which was a lag-filled nightmare due for a variety of reasons (mostly not the fault of the networking itself, more due to overall lack of players with quality connections). The real catch with that kind of "synchronous" network model is that a single player with a laggy connection (or someone suffering from packet loss) will slow down the game for everyone, since the host can't update the game state until they receive refresh info from all other players in the game.