Would probably require a lot of work, but would be a great addition. After a game is completed, both players are given two deck codes. The first shows the initial order of their deck, the second shows the initial order of their opponent's. Then, a game setup option could be added to duels. You can insert your deck order, and that will determine the order of your cards. There would also be an option to select which player goes first. With this, desynchs are no longer a problem (sorta). You can just restart the match. The only difference would be the choices each player makes. It might be better for a player to only get their own deck order, so they can't see their opponent's. You could also use this as replay value, so people can replay matches that they weren't even involved in.
