I've suffered performance problems when being at war. seems like more cpu/gpu is used now.
missions feel pretty trivial
donkeys are a funny addition.
need more time for the families, but at the moment I don't like that only 5 great families exist.
Again, the change in mapmodes removing the existing hotkeys was awful, I doubt paradox have efficient players testing their game.
culture/religion are needed a lot to change policies, barbarians for pirates, region/provinces for administrative decisions, pops for buildings, trade to improve provinces, forts for war, diplomacy for CB, unrest for local armies.
See? many modes are needed, and all those modes had some hotkey, and paradox removed just because.