I will caution you on any double leg lift or lowering routine as this is too much for transversus abdominus to hold. (hab-it.com)
The training exercises also are complete in that there are different exercises for all the different muscles of the abdomen, i.e. transversus abdominus, rectus abdominus, external obliques and internal obliques. (fitness-ebooks.com)
So not only is it an appropriate next level exercise program for women with a diastasis but also for those women who are looking for progressive transversus abdominus strengthening exercises! (hab-it.com)