For myself, I miss the days when the companion was someone who saw traveling with the Doctor as an adventure. I am not interested in the mystery that is named Clara.
On Doctor Who wiki, they are having difficulty in identifying what that red whatever is. Is it a planet? Is it a sun? The episode is not clear - for in one instance, the Doctor refers to it as a planet; then later, he refers to it as a sun. Where was the continuity adviser on this episode?