I'm tickled for them, and if Ged and Alex think she can do it, that's all I need to know. I hope they don't get roasted online by the 'She's Not NP' hardheads. I think they rightly figure 'Of course we'll never find someone to play NP's parts word for word', but there's no reason we can't play them with someone else who can get inside the charts and make it work just fine.
Music over time blossoms, takes turns, grows, and it will be interesting to hear the blend of her with them, to see where the performances go.