Hmmm I could direct you here:
http://forum.1cpublishing.eu/showthread.php?t=15046
and here:
http://forum.1cpublishing.eu/showthread.php?t=16342
A few more changes include Skeleton which gets a lay bones and bonerporting skill and the bone dragon's ability to now eat corpses and generate skeletons.
I didn't really like it when I tested it with my 16 int Paladin skeleton, maybe someone else will like it on their mage.
You can summon it anywhere on the field and it does damage as it is summoned. More advanced versions of it have an AE knockback damage spell on it. Problem is it appears to have low initiative and at the advanced stage of the game on in it just gets fragged before it gets a turn.
Dwarves have an Engineer that generates droids, repair/resurrects droids, and an AE attack that blinds level 1-3 units around it AE style for 3 turns. (Pretty brutal).
Guard droids now have a Beam of Light skill that does AE damage in a line 3 spaces long, and does thousands of damage to Undead.
Dwarf alchemists no longer have the Holy Water ability if there is no undead in the opposing team, instead it has an Energy Drink ability (no joke).
All humans now have the Favored Enemy ability which means the first unit to hit it takes 20% extra damage from your unit for the rest of the encounter.
Thats about all I can think of, most drastic changes being with the orcs given the namesake "Orcs on the March".