Interesting to see the opinions around 7 years ago.
What were the poll results before the bump?
I wouldn't mind Natalie (or however you spell it) becoming a permanent secondary vocalist for the band. She's Axe's girlfriend, so it might cause a problem if they ever seperate... that aside, it would be cool.
They would need to use her differently than on "Coil", though. It worked for that song, but if she were to become a band member, they'd need to use her vocals in more interesting ways. Maybe if she were used for ambient vocals, as well as singing lyrics and such... treat her vocals more like an instrument.
She wouldn't be much use when the band plays their older stuff live, though. That would make her stage appearances feel kind of wonky, popping on and off stage all the time. She doesn't seem like the type of person to do stage theatrics to appear busy, and even if she were, I can't imagine it working very well with Opeth's music.
Live performance issues aside, I think it would be cool. Those worried about adding more female vox making Opeth sound generic... dudes, it's Opeth. Mike would find a way to make it fresh and unique.
Probably won't happen, though, and that's fine too.