In patch 5.4, We have added a new mechanism -- 'The Crowd Chose You!!!' to the arena. We added it for two reasons:
1. We don't want the fight to last too long;
2. We want to ensure one team to be the winner in each fight.
However, we don't want players to change their playstyle due to this mechanism. Unfortunately, we are not happy with it after this mechanism was added.
We decided to change it in a different way. In the upcoming hotfix, we will completely remove 'The Crowd Chose You!!!' and replace it with a new mechanism called 'Suppression'. If a fight lasts longer than 10 minutes, all of the players in the arena will get a stacking debuff that reduces healing by 1% every 10 seconds. This effect will last until one team wins the fight. Under extreme circumstances where the winner cannot be decided within 20 minutes, the system will end the fight and randomly decide the winner.
We think this change will have less of an effect on playstyle, team composition and strategy than 'The Crowd Chose You!!!' did, and make the fight more interesting and exciting. We are doing internal testing now and will update it when it is released.