I assumed it was simply broken because the minos spot me all the time through shadow walk and max possible hide and note silently in wraith form, same with blockade buster.
But for any pug is it worth losing the conquest bonus? I'm not even sure how much XP it gives. In all my recent groups people actually go around manually using the alarms to get conquests and monster slayers. That doesn't make the pug quality bad, I prefer getting every XP bonus possible.