"But if I danced step 1 of the Feather, as gent, would the heel of my RF be in contact with the floor and only released when the weight is taken onto step 2? Or would the heel be released from the floor when the weight leaves the RF to be transfered?"
Neither. The step is an upswing with HT footwork, which means that you shift to the toe (and beging to release the heel) before the end of the step. The step ends when the left foot passes the right on its way to step two. So your heel will be down until shortly before the feet pass, but then will rise.
Contrast step 4 of the feather/feather finish leading into a three step. This does not have upswing, because that will not occur until the next step. So it a heel lead danced H only, not HT. In this case the heel stays down even as the feet pass, and rises sometime shortly before the moving foot finds its place.
The reason we got into this is that someone had argued that the standing heel would release as soon as the moving foot started moving, which is not true. In fact it's just under a half (upswing case) to just under a whole (flat case) step time later.