Well for those who believed that the original manga was a mess, especially at the end, this sequel manga saved it. The pacing is great and the storyline is enjoyable.
Personally, I had more fun reading this sequel then having to read 93 chapters of the main protagonist going back and forth in her love triangle.
It shines a light on the characters who deserved more screentime in the original manga, and I would say they were pretty good character development. There is also focus on yuki/zero.
The art had not changed, which is good, because it would be odd to see the art be drastically different.