>>892388They could have just put her new head on that body and called it a day and people would have been happy.
New outfit to go with it is more exciting overall though, it looks like the intent is for her to be utterly reborn tonight since she now has YT membership and has gotten her toe dipped into regular Holo gaming streams etc.
I'd suppose either Cover simply didn't give her a choice to integrate into the regular Holo activities, or she has herself become more curious about what it actually means to be a vtuber and not just a singer with a virtual avatar. Finally the elephant in the room is that Cover has been working on EN vsingers, and probably they want to integrate AZKi in as a more regular type Holo if they intend for the incoming vsingers to be a similar hybrid, so that everything matches up.