Advanced descriptions were less work than I thought to finish. Here's an example
http://koti.kapsi.fi/~elmokki/dom3/unitgen/example.txt
They should show all the stuff UnitGen generates, but some filters may be bugged, it may be unclear sometimes with filter stacking and it requires updating to advdescriptions.txt at /nations/ when new filters are added.
http://koti.kapsi.fi/~elmokki/dom3/u...18_7_12-v2.zip
This should be a good feature for picking nations.