We DVR all the Colbert shows, but we don’t watch every one. I did like his stinging commentary about Trump.
But all there late-night shows fall into a routine. Steve Allen had man-on-the-street. Carson had the psychic bit. Letterman did the pet tricks. etc. Colbert had the “first drafts” and Colbert Questionnaire, which was really dumb. It always got predictable. If you’re so creative, make up a new idea at least once a week.
That said, this does sound like self-censorship.