Dave I read this as the kick is my most recent focus.
IMO the goal is for one leg to be dead straight and only one to move in a small flick-kick. I think the glutes, lower back etc will be stressed by keeping the leg still flat and pointy, especially at the start of doing this, as well as coming into play during the uplift of the leg that's about to kick.
My focus is on starting the main rotation (cued by gravity on recovery arm) with a small kick just before the hand enters the water.
A psychological disorder is: "Any personal construction which is used repeatedly in spite of consistent invalidation."
~ George Kelly
"The water is your friend.....you don't have to fight with water, just share the same spirit as the water, and it will help you move."
~ Aleksandr Popov