> Seems it's not installable because it requires gwenview > (>=4:3.1.0+cvs20021221+kl-1) but only 0.16.0pre1-1 remains.
kdeextragear-{1,2} should not be built as a single .deb; instead, the individual apps are on their own release cycles and should be packaged separately. In particular, if kdeextragear is packaged all at once, this will wreak havoc with the version numbering - the kdeextragear version 4:3.1.0 will almost certainly be larger than the proper version number of the app, making upgrades to the real (individual) packages non-automatic. b.