I am sorry but limiting premade to light party just demotivates team play for those who enjoy PvP'ing. I run with a group of 4-8 people regularly but on my Data Center all the players are transferring to Mael. Just because I form a premade doesn't change the shape of the match. Often time we end up going up against another premade. I often see Gracidea Shaymin who is amazing to go up against. We often lose but it makes it more fun to do it as a group of friends. This is a game that promotes group play so why limit it.