Do you honestly think the delay is gonna be so long that the enemies will have time to take out you and your fireteam without you having any chance of escape. Even still you could get the shot off then escape whatever is about to kill you in the circumstance that you are talking about. Also I don't see anyone saying what you said unless they are in a position where the dangers of dying are very slim that way they could get easy orbs from a very weak group of enemies. IMO the weapon seems quite useful in the PvE setting.