Hi Abasan,
this is just to inform you that I tried to use the "letting-down" method for shiho nage you showed in your photo - and it WORKED

.
I tried it on a blue belt, and as it worked fine, I suppose I could also try it on the white belts - just slipping the wrist down over the leg instead of letting poor uke spiral down with a free hanging torn wrist.
Thanks a lot for the insight,
Eva