• AI is a bit more aggressive at hard or higher difficulty and a little less aggressive on normal difficulty
• ARMG no longer has 50% chance for creating stone hall themed underground, instead has 50% chance for dungeon underground and 25% for the others. Also reduced creep strength on first 2 zones of ladder templates
• Spirit Link hero ability triggers if at least 1 creature is killed
• Sorrow Strike creature ability duration from CREATURE_SPELLPOWER to 1 + CREATURE_SPELLPOWER/20
• Wheel of Fortune creature ability duration changed from CREATURE_SPELLPOWER to 1 + CREATURE_SPELLPOWER/5
• Rage of the Forest creature ability will not disable "Entangling Roots"
• Regeneration creature ability is completely reworked - instead of healing for an average of 60 per turn it will heal the creature for as much as possible but is limited to a healing pool of creature_weekly_growth*creature_type_hp + 10%*stack_hp
• Hero bonus daily income from artifacts, skills and creatures is now present in the game resource bar. Income overview in the Town Management pane is removed.
• Skills and perks affecting allied and enemy creatures are now visible in the creature spell effect bar (available when you right double click on a creature in combat). They also provide a brief overview of what each effect does.
• Sar-Issus set creature spellpower bonus is now 100% for 4 equipped pieces and 50% for 2 pieces (changed from 100% for 2 pieces).
  
  

FIXES

• RC18f bug: Game will crash if hero with Ignite perk casts firewall.
• Arcane Allies perk effect applied on ability spell costs (not on channeling!)
• Master of Fire perk wrongly calculated defense reduction. It uses the defense value of the target during the time of cast and then substracts it from the base defense value. Now it always uses the current value and just halves it.

• archery and evasion nerfed to 15%
• encourage nerfed to +0.4 atb
• Avenging strike buffed to 0.3 atb reset
• retaliation strike nerfed to 0.15 atb reset
• fire trap, nerfed to 12*SP dmg at expert
• raise dead nerfed to 32+32*SP heal at expert
• resurrection buffed with 50 base value at expert
• celestial shield nerfed with 200 less base value at expert
• reduced orb artifacts to +30% dmg
• coif of the prophet buffed to 16 mana per day
• staff of sar issus now gives 50% more mana and spellpower to creatures at 2 items and 100% at 4 items and no extra hero spellpower.
• crossbowman +1 attack, -1 max dmg
• inquisitors -2D
• seraphs +2D
• all sylvan tier 1, -1 initiative
• war dancers -1 speed, wind dancers +1 speed
• high druid -2HP
• ancient treants +1A, -1D
• savage treants -5A, +5D, now their functionality is more similar to the alternative before they rage, also simplifies the math of the ability for the player
• pristine unicorns damage changed to 14-18, average reduction is 2.5%, lowered effect of divine strength and weakness to make it more different from the other
• crystal dragons +5HP, +5 max dmg, -3D
• stalkers +1D
• black and red dragons +5 max dmg
• vampire princes +1D
• rakshasa ksatri -2 min dmg
• giants +1 initiative, +20HP
• all centaurs +1 HP, +1A and +1HP at first rage level
• all cyclops +1 speed, +25HP on 2nd rage level instead of speed
• 5 wood cost for bear pens moved to arena upgrade
• 5 ore cost for dragon graveyard moved to vampire upgrade
• 5 ore cost for dragon graveyard upgrade moved to crypt upgrade
• emilia no longer starts with summon elementals spell
• ivor reverted to empowered chain lightning at lvl 30
• edited descriptions of spirit link, symbiosis, rage of the forest and regeneration
• edited descriptions of kyrre, gabrielle, xerxon, marbas and agrael

For more details read the article on moddb!