So some people complain about those who purposefully drop in arena and then face those who are ill equipped to face high level dinosaurs. As a possible solution, I would like to recommend a time out feature where if individuals lose a certain number of battles in a row (lets say 5 for sake of argument), then such individual is temporarily suspended from the arena lets say an hour. After resuming, if you continue to lose another 5 in a row, another longer suspension eventually accumulating to a 24 hour suspension. That way not only are droppers suspended, it helps relieve frustration from those who are not intentionally doing it by giving them a break and gives the unfortunate opponent not able to compete a overlevel team a better chance to fight in a fair arena.
Just a suggestion and yes I know it may not be recieved well, but I think its fair.