I feel that some characters benefit from this art style change, Naya and Madea had the best changes in my opinion,maybe Reigna as well, they used to look kinda ugly, but now they look cute, and I think their art stays consistent most of the time.
But with character like Eliette for example, the shift between art styles is noticeable, which I guess is caused by the artist still figuring things out as the development goes, like certain characteristics or proportions, but it seems that they have settled on one singular art style now, hopefully it stays, some of the scenes have beautiful lighting and shading.
Unfortunate as it may be, the only solution to this mismatched art style problem would be to redraw most of the scenes into the current art style, but I feel like that won't happen for a long time