While long legs may contribute to speed on the ice, they also raise the skater's center of gravity, making it harder to maintain stability and balance on the ice. This is why most of the best skaters are not very tall (Evan Lysacek is an exception). If Caroline were strong, she would get more speed with each push in her stroking and she would get more height on her jumps. Instead, she relies on the counter-twist of her torso before takeoff to help her spin faster in the air and complete the rotation. The more speed a skater has going into a jump, the more any flaw in technique will be magnified and the greater the chance of a fall, so this may be one reason she slows down before her jumps (especially the 2A).