If people are content to read stories that adhere to a particular status quo, then it shouldn't be changed on a whim. If the series has stagnated so that no one wants to read stories that adhere to it any longer, then changing the status quo is warranted.
This assumes that your story universe is broad enough that new stories within a given status quo can always be written. Star Trek in general doesn't have this problem, but many new TV series are set up as one long ongoing story, where viewers don't expect there to be
a status quo from week to week.