52+ is a good score for a new team, and based on the video already up on Twitter, I'd say it was well deserved.
Some little stumbles here and there, just like you said, but I think that's mostly down to nerves and inexperience on Hyejin's part. They complement each other well, both have wonderful posture and are very fast. Their interaction after the skate was also very cute, Hyejin seemed to be quite happy about the skate.
I'm looking forward to seeing more of them, I think they have all the potential to become a successful team.