Sorry to be so negative, but uggh... So much work has gone into KDE over the years and it still reminds me of 90's IT-guy art. From the rainbow colored icons to the cluttered layouts to the mixed light and dark themes.
I was actually more excited about the functionality of Dolphin, than the default theme, which is a bit dated. I have seen some people do some nice themes for KDE. Better defaults are needed, I agree.