No essay on a modern EU4 patch is complete without addressing technical performance. Version 1.35.4 was a notable improvement over the disastrous 1.31 “Leviathan” patch, which caused stuttering and crashes. Paradox optimized the AI’s pathfinding and reduced the frequency of army recalculations. The result is that the game runs smoothly until roughly 1700.
Beyond the headline fixes, v1.35.4 introduces subtle but profound changes to the AI's "brain." In past patches, the AI would hoard monarch points or build useless regiments. The new logic includes: Europa Universalis IV v1.35.4