As subject says, the krusader ebuild doesn't reflect the new kde-splitted-ebuilds.
Looking at the configure.in.in it checks only for libkonq, but probably also the kdebase-ioslaves can be useful (but no needed). Can you please test, with only libkonq (of all the kdebase-meta ebuilds) installed, if it compiles and works well? Thanks.
Anything new? It's annoying to change it in the ebuild manually every sync.
If we'll get more help by our users will fix more bugs. BTW You should read the handbook to learn how to use an OVERLAY. Nothing should be touched under /usr/portage. By now I'll add both the libkonq and the kdebase-kioslaves deps.