It depends. CeVIO and VoiSona have their feet in both camps right now in terms of "we have a lot of cool characters," and also "we have really high quality synthesis." So, on one hand I could see why CeVIO/VoiSona fans and V6 fans have overlap (V6 has many characters). However, I do agree that most would find the quality drop to be a significant hurdle. I'm a fan of V6 myself, pre-ordered Galaco as soon as I could and got the bundle, but objectively it's the weakest commercial engine for the largest price point. I don't see much regular V6 AI usage either - while anecdotal I'm still fairly confident that the most usages of V6 come from people who want to use older Vocaloids (not AI).
I feel like they should've just like, released a re-package of her V3 voicebank or something. Yes this is an alpha version, but it doesn't sound much different from a regular V6 release, and all of the V6 voicebanks just pale in comparison to competitors for a much steeper price. YAMAHA made a 2.0 vocoder update for VX-B that sounded significantly better last year, I'm still wondering why we never got that...or any word of if it would come out.