Exactly-Star Trek is great when it is compelling stories with compelling characters, not strict adherence to "Gene's Vision" or "fans love." Fan love is, at best, finicky, and at worst, extremely jaded and hostile.The story in City on the Edge for example, or The Visitor, or Inner Light--all of those stories would make compelling TV no matter what era.
Writers can't take "what fans like" in to account because that is capricious and constantly changing.