I could see it working if it was limited to boss fights. Since as far as I know the game offers no way to reset a boss fight without a full wipe anyway since the group is locked in a no escape arena. Just...please keep it away from trash monsters >_> the novelty of it ran verrrry thin in situations where you were out running and a monster smacked you, triggered a damage shield and would just chain summon you. Or if an add or two agroed when fighting something, you wanted to run to reset and would be chain summoned to death.

Now if they gave Monks and Dark Knights Feign Death, Ninjas Escape and casters Exodus thaaat would be a different story lol