I loved Harley Quinn as well. Margot Robbie is amazing in all her roles and she outshines most of her illustrious colleagues here. I was disappointed in the movie because it felt rushed. Batman vs Superman and Suicide Squad combined probably have material good enough for 5 movies. Suicide Squad in particular, couldn’t make up its mind on whether it should spend time building character back stories or should it spend time developing the plot. In the end, I think it was unable to do justice to either.

I agree with you in principal though. It’s a fantastic idea. That villains are people too. I applaud DC Comics and Warner Brothers for at least trying to create something different to the usual superhero formula.