If I dance the Whisk as Lady, I release the heel of the RF as I take full weight on the LF on step two, and start to draw the RF to LF, with the T in contact with the floor (just as a close - after all, the Whisk is a modified Closed Change). This suits the pattern of rise, and allows me to arrive at the crossed position "Up".
There is no foot swivel on 1, and I would say that the foot doesn't move at all, until it starts to cross behind. In an exam demonstration, you find yourself in a very uncomfortable position of the feet, having placed 2 with 1 still in place, but the actual action is more continuous, and flows perfectly naturally on the dance floor.
There's no T release on LF in the Back Whisk. If there were, and you followed the instruction to release the H too, you would simply have lifted your foot off the ground altogether. The note: "When crossing LF behind RF on step 3, the H of the LF will be released from the floor", confirms that the normal backward walk action, including T release, is not required. Think of both figures as Closed Changes that cross behind (Cross Change?), and most of the problems disappear.