what album would you have liked them to sing?
What albums by other artists do you think would have been perfect for women either as the supremes or solo? what album would you like to hear as-is, just with diana or someone singing?
for instance
Guilty would have made a beautiful solo album for Diana. you could literally wipe Barbra's vocals and I could hear Diana one each and every track
Martha's MCA album would have been a great one IMO for Mary Wilson
so you're not changing the producer or the tracks. just the vocals