You could try loading all the KDE packages, but you are kind of defeating the purpose of Standard then (a nice small fast distro with a lighterweight environment).
I don't lile to see Standard pigeonholed as just a small fast distro with lighterweight environment. It's that, but it's also a good base for someone to create the system just like they want it. I wouldn't hesitate to add KDE if I wanted it, but I don't. I don't really care whether something is lightweight or not.