@shadowfax - If I'm honest Kev, they do sound rather processed, even with the breathes in.
I had the same issue with breaths on a couple of numbers and one song I left em in, the other I took em out, it fitted each song. As a guide I leave em in when it's an emotional meaningful song usually sung by a female vocalist and by it's nature, rather exposed, and get rid when it's clearly not adding anything to the overall piece.
Intersting about the non vocoder, you could market the 'Molegrip Plugin', I can see it now, a pair of animated cobblers with a molegrip clenching them, the more you squeeze, the higher the note shift and the format goes with it...Who needs Melodyne...Then there's the logo, the merch, the inevitable interview with top Producers that have worked with Madonna, U2, and others (seems like there are 100's of them) on your website....you're made man...
Happy Sunday