Even better, why not tell the player the name of the discovered site in the message?
Yet more:
More unit trait icons: I'm thinking of drain-immune, minor death bless, gem producers, spy ability, assassin, shape-changer etc. Almost every unusual trait should have an icon on the unit screen.
Accurate army depiction on map: There's no reason to not show every unit in your armies in the correct proportions, rather than just the most common one or two.
Better fort icons: A great city should look different from a fortified one. In an ideal world, this would extend to the map icons as well.
Jotun hurler defence boost: Is there any particular reason they have such a low defence? They only have a few shots, and then charge into battle, where they inevitably get clobbered.
Marignon mage age reduction: A fairly weak nation is made all the weaker by hobbling its priest-mages with old age.
Reworked Conquerors of the Sea: It's a fair old mess of a theme at the moment. Mixing diabolic faith and CotS was a mistake.
Reworked Black Forest: As above, but even more a mish-mash. Illuminati, vampires, villains, holy inquisitors, paladins, wolfherds, rangers, fortune tellers, ghoul guardians, zweihanders ...why? I'd remake it as a B-movie style vampires and werewolves nation, but that's just me.
I also agree with proposals
8, 9, 10, 11, 12 and
13.