Dawn is an original triaX weight-mapped figure.  It is not Genesis-based.

Simply exporting a WM figure from DS does not produce an ideal figure for Poser.  The two programs have some divergent systems that the exporter does not account for.  IK is not produced, which is needed for Walk Designer/Animator support, etc.  Poser needs different scaling zones for proper scaling.  There are other touch-ups like getting nice Poser shaders on the figure for skin, SSS, etc.

They want to do this the right way so that both DS and Poser users can have an excellent figure to work with.

.