It was very nice. We have seen depth from several characters they have not shown or barely shown in original series' timeline.
I also get reminded of how much i missed some characters
I liked the insight especially from the sides of Mine and Seryuu. I knew they were friends but it have shown how much Schere meant to Mine better. Seryuu despite looking like a mainac; she indeed seeks for justice but she thought she found the answer to it in a different and wrong place.
Leone was just badass. Braht, Schere, Rabac and Nea were adorable.
Imo original timeline can have such chapters for building up characterizations and relations.