Rokien's new thread on Open World.

[Rokien]

Then more people get close by, and even more appear. Then your screen begins to lag because of all the characters around you that your computer needs to load. Then the lag screws you over and someone else takes it. Don't kind yourself, you know a large amount of people would be watching the fight.

Lag wont be an issue in 2.0 Yoshi even said it himself. It's also easy to have everyone that isn't in the party to not show up but a few..... I mean, there's ways around it.