I should say for me, that an easily defined rocker curve transition point (in rocker curvature and/or direction) near the ball of my foot (which I was told to call the sweet spot, though not everyone uses it the same way - e.g., see
Scarlet Skater and
Aimée Ricca), is an advantage, because it helps me feel when I am there.
Of course, many skate techs do gradually lose that transition point through sharpening, which I don't like. I deliberately exaggerate it.
I have also wondered if a second transition point, a little behind where the toe pick would start to engage, would help me to stay within that zone when spinning. I have also wondered wither a second transition point, near the back of the skate, would help me do backwards turns better. Some blades do add a second transition point, though I'm not sure if that is why. (Yes, I know some skaters prefer a turning technique that does not use the back of the blade.)
Freestyle skaters currently earn most of their points on jumps. Depending on where in their range of motion they are strongest, it is at least possible to imagine that some of them might vault higher in the air if the spin rocker transition was more gradual, and stronger at the end. But I'm not sure of that. Many jumps start on a turn, so perhaps it is better to have a well defined transition point??
There is already
significant blade profile variation. Would it be surprising if some figure skaters would do better with some gradual transitions?