You are growing and growing in working with the AI voices. You only have one competitor, well more a soulmate i should say: Jannesan.
Natalies' vocals are sounding very humanlike. Impressing!
I think it's the other way around - the SynthV vocals are getting better and requiring less work. And I'm not complaining about that!

I only had two remarks on the song; For me Natalie starts singing almost abruptly, just after the song begins. And to me she sang very close in the mike, maybe a tiny bit too close. But beside those minor things it is a very nice song and a wonderful voice.
You're right on both counts - the introduction is abrupt, and it's a very close-mike sound.
I'm not sure how to make the intro smoother. Starting on a strong plosive -
/k/ doesn't really provide a lot of options. I considered
"Please catch me..., and it's still an option I may play with a bit.
I was going for a very close mike sound, but there's reverb to soften it. Getting a good balance with the vocal is something that I struggle with, because one of my main considerations is making sure the lyric is intelligible as possible. (Although using words like "pirouette" probably doesn't help).
I adjusted the vocal in the mix a bit, adding some reverb to the aspiration and backing her off the mike a bit. But that's the mix you heard, so there's still probably some room to go.
I watched the site and instruction videos of these vocals some time ago. I skipped it, because of it's learning curve in relation to what i still had to learn about other challenges on the mixing and mastering front. But there comes a day I want to use it for my background singers...
It really is a cost/benefit sort of thing. I think it's actually pretty easy to use, but working with piano roll notation isn't the most fun thing ever. You
should be able to import MIDI from BiaB, if that's part of your existing workflow.
The biggest advantage for me is that I can easily make changes to lyrics and melody with very little cost. For example, I changed on of the lines in the last version, and it took almost no effort. Once the notes are
in the piano roll, it's easy enough to move them around and try all sorts of things.
Thanks for listening and commenting!