Vubers are just a gimmick, there's no difference between watching them or your average streamer, all you get is some boring girl, with a character that has 3 to 5 expressions, because nobody really does anything interesting with the concept.

think about it.

Marine is a pirate, Ina is a squid and Gura is a shark. you would think they would came up with a interesting backstory about how Ina and Gura are sworn enemies because their parents have bias against each other, so they refuse to collab unless they are in a group, they would eventually grow a bond, but still kind of feel weird on each other's presence. Since Marine is a pirate, she could be a hunter of dangerous sea creatures and Ina and Gura could team up to defeat her? something like that?