I've been thinking about this and had meant to come back to it. If anyone's still interested, here's my take.
A powerful and efficient pedal stroke has the heel of the foot +/-15 degrees from level with the ball of foot. I refer to this as "the heel is BEHIND the pedal". I use the word behind to differentiate from above or below very intentionally. With the heel behind the pedal, there are a lot of fore/aft forces going on. Look at the cycling shoe. Orient it to a "heel behind the pedal" (horizontal) position. You see nothing more than elevated points both in front of the heel, and in front of the toes. It's shaped like a foot. These contours allow a relaxed foot to stay in place inside the shoe.
Alternate short answer:
The heel of a cycling shoe is NOT elevated.