I have the feeling that SNKP is putting more love and efforts into new characters than in classic ones. Kyo looks terrible, and Andy, Athena, Kim and some others look a bit off. While new characters look pretty well done. That's not fair :/
I said something like that on a previous post, about snk working more on the new characters than the old, with the old cast they have a reference from past games go draw from.
They are putting alot into this game, new story, 2 bosses, 18 new characters new to kof, entheses on ballance, new and updated game systems. They can bring out character personality in the story mode.
They are tweaking the colour shaders all the time as it's been seen already. We have to hope the final old cast designs are up to par with what people expect. Personally I like them as they are. I'm more concerned with the gameplay at this point.