(this is an old v1.80 install, I just discovered by going here that 2.0 was out!)
My game currently shows all monster groups (even dragons) as "weak". I tried launching without mods, and even without a Mods/ directory. However, I did install a few mods (such as the wildlands boss fix) that require to be installed in the main game directory, so some files there could be corrupted.
Have any of you already seen such a bug? In which file should I look for a solution (by grepping the strings for threat level I found them in ElementalDefs.xml, though it was only for color definition...)? And is there a way to restore one XML file without reinstalling the whole game?