Both kde5 and xfce-sysv have received their fair share
of criticism for substandard fonts; zerg@ has proposed
adding droid fonts to the former and someone expressed
their frustration with Terminal fonts in the latter:
http://www.opennet.ru/openforum/vsluhforumID3/104750.html#70

Let's try to make some difference between Xfce based
flavours as well by changing the kernel to a bit more
"bleeding" one as proposed either.