Three extra difficulty levels added: one easier and two harder. The current difficulty levels is considered normal.
Normal unit can now move onto misty or water hexes with a hero on them.
Camera now follows enemy moves.
Full screen mode added.
Scaling algorithm changed to take UI scaling into account. The game should now remain pixel-perfect even with non-integer scaling modes (150%, 175%, etc.).
Balance
Air Shield now prevents critical strikes from all ranged attacks.
Several T3 and T4 creatures had their attack strength reduced, since special attacks are now valued more highly.
Regeneration (spell and ability) strength reduced from 15% to 10%. Spell now lasts until the end of combat and its perfect form has increased radius.
Minor
Lairs now are part of a city limits. That allows to cast certain spells on them easier. They yield no resources.
Neutral creatures regenerate HP between world map turns (wasn't working due to bug).
Improved district descriptions.
Improved victory dialog.
Cleaned up main menu text.
Changed prompt buttons to be more flavorful.
Changed defeat dialog to be more flavorful.
Added a dialog for when a player city without a garrison is captured.
Fixed various errors and unclear wordings in descriptions.
Fixed visual issues and animations when embarking and disembarking.