That would be cool of course. But from what i read (The Deserter debuff given to players who leave a dungeon prematurely when queuing via the Random Dungeon option has been increased to 30 minutes, up from 15 minutes. The cooldown for using the Random Dungeon option remains 15 minutes.) i'm not so sure. But obviously you might have better info. Also possible that i read it wrong as i'm a non native english speaker.