You haven't told me what is being "taken away".The word phylactery is cool. It is one of the most interesting words used in D&D. I find it a lot more interesting than soul jar or soul amulet. Largely because it has an obscure ring to it (and it is an unusual sounding word)
Also when you are constantly shifting things around, it is confusing to people who already know the system and the settings.
And do you really think that any D&D player who is familiar with the word "phylactery" used in the context of liches will be confused by phrases like "soul jar", "soul amulet", "soul object" etc? I find that concern pretty hard to take seriously.