There's a lot of great advice in this thread, but it ultimately comes down to her riding style and the conditions you're normally riding. If she likes to carve and really dig the edges in on icy east coast snow she probably will want a traditional camber deck.
On the other hand, she might find a different brand's hybrid/rocker shape perfectly acceptable. It's totally possible that she might find Magnatraction (or whatever) fixes the edge complaints she had with the Vario sidecut. For example, you might have her demo a Gnu B-Pro and see if she still has the same complaints (Warning: it looks absurd).
If you can swing it I actually second Mixie. If she liked the Lotus in pow keep it for trips and the occasional pow day. Then pick up another camber deck for her everyday cruising/carving/riding. If you can't, sell the Lotus and let her pick out something else she'll be happy on for the majority of your riding.