You originally misunderstood Eliezer's point, and now understand it.

If many people will similarly misunderstand it, that is a reason for Eliezer to change it on lesswrong or if/when it appears in his book. If you are relatively unusual, it is only a weak reason.

Reasons not to change it would be a lack of viable alternatives. Can we think of an alternative better than "post-utopian" or "barnbeanbaggle"? For example, a less meaningful term from literary theory or another field?