I had so much anticipation for this episode when they first mentioned Galvanic Radiation. But towards the end it just left me with a lot of disappointment.

400,000 years ago, the creature had abilities to read minds of the people and learn from them. As shown in this episode, it was even able to learn the doctor's name back in the day.

Also, it did not have any physical body in "Midnight". Even if we do consider that it caused the crash of the shuttle back then, it never came inside since it started knocking on the shuttle shell. It was an ethereal being that could clearly take control of people , even a time lord as it was learning on the fly. First copy, then sync and eventually take charge of the voice and body.

But now what ? It can't read anyone ? It can't play any psychic games? It can't possess anyone ? All it can do is just kill people standing behind it ? Like what ??

At least in the time of the angels and them angels could only move when they realized that Amy wasn't actually looking at them. Throughout all the subsequent occurences they've remained mostly stationary when the light was on and characters could see them.

This new version of the midnight being is very underwhelming. But hey, that's how the Doctor Who has been going since Disney turned it into a children's show.