First impressions from listening to Hourglass:

Nice voice. But it seems lacking in emotion and kind of bland. And what the instruments are doing meshes poorly with the vocal melodies, which she tends to flatten out and blandify (as another poster pointed out).

Compare her version of "Lowlands of Holland" with the versions by Martin Carthy or Steeleye Span. In those versions, what the instruments are doing meshes well with the vocal melody, unlike in the KR version where they actually clash at times. And the vocalists sing with great feeling, which makes sense since its about someone's inconsolable grief at the loss of her love. KR by contrast sounds like she's on valium.

Maybe she'll grow on me. But thats my first impression