I don't know, I am sure it will be all right...
I don't really enjoy Harmonium, though...so it would be interesting to hear a new direction. Not that I hate it...but it's really not a stick out album for me. She has some good songs on it; however, they don't seem as "deep" as the material on BnN (except songs like "annie"). So, all in all, while they are girl/boyfriend...I am glad she is working with someone besides Stephan.
At the end of the day, Vanessa is still Vanessa...so I am sure she will have to be happy with the product before letting it go. Linda will pull out a new side, but it'll still be Vanessa. Nessa won't turn into a Christina Aguilera.