Its perfect as reference. The base characters are scanned humans so having something to rotate around while sculpting is excellent. No real need to try and extract a base mesh from DAZ though.
I'm no character modeller by any stretch, so I'd personally have no qualms using DAZ or Poser to do the heavy lifting, whatever get's the job done really. An aside even plan on using a pre-made example from their library as a prop for a possible folio addition with further own sculpting tweaks on top of the base mesh.