I think that the issue is the way it works is convoluted and strange and not easy. My biggest complaint is that once the envelope is ghosted again its hard to see since it is so dark and blended with the clip. If you don't want it ghosted then you have to leave the edit filter on and every clip has an envelope you wanted for one clip. It just seems counter intuitve. Also you can't edit the ghosted clip and you have to select it in the filter again.