Idk if this is happening for anyone else but I found out. I went to the the island and I tried out the arena.. only to find out it is super laggy and slow when in there.. I can't move and when it does I'm stuck there till it decides to finally move. And when interacting it takes forever to do anything.. and since I can't access the menu in the arena I can't get out and in stuck.. so I'm screwed
Taking into account that nothing else in the game is lagging for me, I don't think that's strictly lag so much as the different mechanics. You don't move one square at a time in the arena; you move to the center points of each intersection. Add on to the fact that everyone else is moving as well, and the gameplay is slowed down almost by necessity so that you have a better chance of processing everything and formulating a gameplay plan.
...Of course, I could be completely off-base, but that's just based on observations. I figure indivi will let us know.