I like to bring the hand to my forehead, and use the thumb webbing of my other hand to make uke's elbow pivot upward and out like a wheel - as a short person this is a good way for me to float uke upward.
I like the downward release as opposed to the outward release, and keep uke's arm tight against her body then like a small wave breaking over her shoulder curl the hand over and down in front of my center. Like a bokken cut as gentle or as powerful as called for in the moment.
I do this too, sometimes, whenever, for whatever reason, my forearm doesn't match up with uke's forearm.
Apparently this works with munetski irimi tenkan kotegaesh also, encouraging uke to extend, rather than withdraw ki.