You can now pet the companions who were polymorphed into animals;
Wenduag won’t be able to carry a torch anymore. Spiders are scared of fire;
AC of Playful Darkness has been increased to 150, even on the “Story” difficulty;
Cayden Cailean's clerics now have access to a new pet — “Beer mug”;
Trever’s classes and feats have been rebalanced. Now he has 2 levels of Paladin, 3 levels of Hellknight, 3 levels of Monk, 2 levels of Primalist, 2 levels of Archeologist, 1 level of Magus, and 1 level of Oracle.
Misc
The crossbow in the main menu is now categorized as a feature, not a bug.