From that thread

No. They tried working on one, but if it gets interacted with in the wrong ways by two different people (e.g. one person is using it, and then another person moves it around), it would crash the entire server. Note, this is not crashing just the housing server, it would take the ENTIRE server down.

Imagine one person goofs up (or some people intentionally troll with it) and boots EVERYONE off of Siren or Coeurl or something because they used the glamour dresser incorrectly. That, right there, is why we don't have a glamour chest housing item.