17:02 data/shared/assets/reflectors/lizard/whiteRound_01.i3d (1.49 ms) Here are the last 20 or so lines from the log.txt

All they are doing is sharing their connection Each person that connects will strangle your connection and this in turn causes lag for everyone connected except the host as it just plays like a normal game for the host. Also change the number of available slots for players to how many you want to share your connection. Even giants have stated that the best result for multiplayer is the person with the quickest and most stable connection should be host. If you have a slow or unsteady connection problems will occur. Also the connection of the host depends the speed of the bounce back to their game. If someone tries to join your game as soon as the pop-up appears stop doing everything and let it go. As soon as one item is moved the connection needs to render everything in the exact same location. The map renders like a normal career game.

As the original game is the exact same layout for both people as its a new save. The more work that's been done on a farm the longer the sync operation is.