I love the expansive cast and the evocative setting, and the story functions very well as an introduction, but a few things were missing for me.

My main issue was I felt the story was proceeding too fast. We flew through all the expected story beats at such a pace that none of them had a chance to really land. I kinda wish this episode had been split into two to really build the tension and dread. I feel this story's strength is its inevitability; we know from the outset that Sunlight is doomed, so I wish we had stewed in that atmosphere for longer.

Secondly and more personally, as someone who loves (and is partly studying) botany: I wish there were more plants in this one! I understand it's unlikely Who will ever dig into the science of Krynoid biology or the biology of plants in general (that moment in the glacier at the beginning was a tantalising tease that hopefully will be picked up on in future episodes) but I personally would have loved to see it. At least we had one xenobotany professor as a main character!

And I was not expecting to hear Eight so soon!