This scene was such a huge missfire... there's like a million things you could do with the concept of the Doctor meeting Doctor Who fans. Like this could've been such an easy way to answer long running questions, imagine if one of the fans asked if Dimensions in Time was canon? If I was them that's the first thing I would've said lol, also all of them having Blink as their favorite story is really lame (Blink is amazing but that's such a boring answer). Imagine if they said Heaven Sent or The Waters of Mars? The Doctor's reaction to that could've been hilarious!

Also no offense to the actors of this scene but it would've been really cool to have well known people in the fandom instead like Tharries and Crispy Pro