You know, people who have a problem with change really aren't suited to be fans of a show that has been in a constant flux since day 1, with an ever-changing line of Companions, not to mention 12 different actors playing the lead role (since the show started in 1963). Technically, 14 different actors - John Hurt played the unnumbered War Doctor in the series, and Peter Cushing played the Doctor in a couple of rather not-quite-connected-to-the-tv-show movies.
But I came to the conclusion long ago that there is a large group of people who just don't know how to be happy. So they try to drain it out of everyone and everything else. I call them Fun Vampires (or, sometimes, Joy Vampires). They're best avoided.