Units look a little fancier, and each faction has a unique look. Orcs are dirty, undead tattered and broken, elves fancy with golden borders, dwarves with a stony texture and so on...
Units get bloodied when they kill a lot of dudes.
Arrows stick around in the ground forever now.
Naming
Units and commanders can be given names in the army editor and campaign.
Units and commanders have random name generators, new units will get named automatically.
UI Tweaks
A lot of UI has been reworked, especially in battle. This will probably take a while to get used to, but they definitely feel better to me after playing a while. Main things are:
The Event log has been cleaned up a lot. Only important information is shown, details have been moved to mouse overs.
The dice box (where you roll dice) has also been cleaned up.
Interface during combat has been changed a lot! Dice rolling is moved to the center, the combat score at the top is much clearer.
Bug fixes
Should no longer freeze on post battle screen in campaign.
AI units will no longer try to target dead units. This led to some really weird movement behaviour.
AI units can now properly use the Army Wide buffs. Before they only targeted one unit.