"Lowering at the end of the feather the (RF) has to be far enough out in front of the body so the you can lower and roll smoothly through the whole foot. Why should you pop up when the body action is forward and then slightly up. It's a THT because we don't want to break the moving over the foot into two parts instead of one. Are we talking about the same step?"
Obviously not, because neither dancer has THT anywhere in a feather. Feather finish yes, but not the feather.
In terms of the step on which you wukk lower needing to be placed in advance of the body, this is true - otherwise you will lower into it's toe and not it's heel. However, the way you get it ahead of your body is to use sway to point your entire body along a vertical diagonal at it's position - you can't just reach it out there on it's own without grossly distorting your outside partner position. You also want to delay placing it until your body has had a chance to drift through step 2 - if you can't yet drift step 2, your step 3 distance will be very small, and you shouldn't rise very much or you will "trip" over your step 3 placement when the rise energy gets converted back to speed.