>>53035207I'd say the quality is probably so much better than most because
1)She is really good at drawing expressions, most of her art focuses on them at least partially
2)She makes both the model and rig.
I'm guessing 2 matters a lot. I don't know live2d myself, but If it's anything like 3d modeling even remotely, there are probably many things she can optimize/stylize during the art process, that then become useful due to how rigging works. I guess I'm thinking of something analogous to having good topology in 3d deforming meshes.
And I guess I'm probably biased because I just like the weird bug monstergirl aesthetic in general.