Optimization
improvements to shadow frustum culling and visibility based on camera distance and angle
optimized long list of least performant units, including all Gallic and Germanic units, some Dacian, Galatian and Brythonic units, Ligurian warriors, Thracians, Daunians, Indian spearmen, and a few others, helping performance (especially in battles with lots of warband).
Sound
fixed issues with some button/roll/start sounds fading out prematurely
UI
emphasize army destroyed text in map campaigns