On one hand, I actually kind of like that its really different from her Vocaloid design, maybe if they really put in the work to try and build up this new design's brand and image on Cevio, they can make derivate designs off of this, and make this design synonymous with the mental image people already have of Yukari as well.
On the other hand, I think that it could also kind of hurt Yukari's character as a whole. Her image is a huge part of her popularity, what with her classic Voiceroid visage and her more obvious rabbit motif, I can see why splitting off her character with this look on Cevio might be a bad thing for her in the long run. Now Yukari both looks and sounds different, and that might alienate and confuse people who aren't already fans.
As far as her voice, I think she has so far, the nicest one I've heard on Cevio yet, which isn't saying much. She sounds like a breathier, Cevio engine sound heavy Yukari we already knew from Vocaloid. She doesn't necessarily sound any better, but she also doesn't sound much worse either.. One cool advantage that we can probably look forward to though, and one that I don't think many have really talked about yet, is how we can expect to see her voice react in new and interesting ways to the different parameters and tuning methods CevioAI will have to offer. Like or hate how Cevio vbs sound, the way in which they sing is very different to Vocaloid. Sasara, ONE, and the Color Voice group all have very resonant tones that can't be exactly replicated in Vocaloid imo.
Idk tho whether this Yukari will be a flop or success, is totally up to Vocalomarkets to decide I think, only time will tell..