I think that's the case, but not sure. Paladins can only locate blessed stuff (I think). Invokers can only locate stuff made out of certain materials. Necromancers get gravesight, which seems to be mostly useful for finding people who teleported away from you and died. I think healers, shamans, transmuters and shifters lost it completely, except for one shaman path that gets it as part of the path. Not completely sure about transmuters. Just roll a level one and look at your skills list.