Yeah i recall the reason at the time being that it would look awful for characters who kick, like Martial Arts, because the legs would be coming out all over. NPCs like CoT and the Carnie Illusionists don't have legs or kicking powers to worry about, so the whole body model is the skirt. I'm curious, if a Martial Arts or Martial Assault toon has the temp costume on and activates a power, what does it look like?
I don't think I've ever seen a martial artist on Homecoming, so I don't know how widespread of an effect this would have, but, I remember the reason given at the time was that the (live) team wanted to have as professional a product out as possible.