I think mikecat's case ticked people the most due to the uncanny similarities between her new model is when compared to her rushia model (though it could be also the case of samefacing but eh), we know for a fact that people would commission any big-corpo model artists for the initial boost but none of the available VTubers so far had similarities in their model that might mirror anyone in hololive, same case to ex-niji who decided to work with their old model mama again like misumi
edit: model reel from the person in charge of her live2D in case anyone need it
It might just be the shorter skirt but the new model looks more leggy and slender to me. It really doesn't come across as the iconic Rushia to me. I think she should be okay and it would really petty and vindictive to go after her..... but who knows.