I wonder what the worst single Idea in the game could be.
Throwup between
+20% Female Advisor Chance (Mantua)
or
-10% Cost to Justify Trade Conflict (Genoa/Venice)
I'm pretty sure the 1.3.1 patch will also ship with the ability to give custom nations
Transport ship combat ability, which probably takes the cake for worst combat related idea.
(The Synthetics have +50%
increased fire damage taken in their traditions, which is hands down the
worst idea ingame, since it's the only one to give an actual debuff. But they're an easter egg so...)