Monsters can be cursed with multiple Necromancer curses at once.
Players that are chilled/frozen now have their castrate reduced alongside their run/walk and attack speeds.
Secret Cow Level and Cow King Kills
Killing the Cow King will no longer prevent you from opening the Secret Cow Level again on that difficulty.
Area Map Changes
Act 2: The Maggot Lair tunnels are now much wider[2]
Skills/Stats resets
Nightmare Bosses now drop essences used for Token of Absolution.
Reference
FRW = Faster Run/Walk
FCR = Faster Cast Rate
IAS = Increased Attack Speed
AOE = Area of Effect
CD = Cooldown
AS = Attack speed
MDR = Magic Damage Resistance
PDR = Physical Damage Resistance
FHR = Faster Hit Recovery
HP = Health Points
AR = Attack Rating
MS = Movement Speed
Druid
Summons
You may only have 1 spirit and 1 vine up at a time, all other summons may be active
Oak Sage
Grants flat life instead of % life as well as providing a life regen aura that scales from points in carrion / solar.
Carrion
Grants AOE heal to nearby allies whenever it consumes a corpse.
Solar
Grants AOE mana to nearby allies whenever it consumes a corpse.
Raven
Now hits 3 times, caps at 12 ravens and at every 10 hard points spent.
You may now summon an additional raven per cast (max 3).
Ravens now have both wolves and grizzly as synergies and are part of the summon toolkit as well as doing small splash damage and partial cold damage.
Spirit of Barbs
Now has a flat reflect damage value that scales instead of % of monsters reflected.
Grizzly
Now has a melee splash at 20 hard points, grants a second bear.
Shapeshifting
Rabies
Spread tick rate increased and spread radius increased.
Hunger
Allows werebear form to consume corpses for a short buff to movement speed, life leech, and critical strike chance.
Werebear
Is now a level 1 skill and grants enhanced damage% and enhanced defense% (keep in mind defense works while moving).
Werebear now grants a buff to summon grizzly i.e. leader of the pack and a decrease to wolves (Infinite duration "9999 seconds").
Werewolf
Grants enhanced damage %, attack speed % and 1 flat mdr +pdr every 3 levels. Werewolf now grants buff to wolves i.e. leader of the pack and a decrease to grizzly (infinite Duration "9999 seconds").
Lycanthropy
Now grants increased maximum life and attack rating to all shapeshift forms.
Fury
3 hit cap instead of 5.
Shockwave
Stun is always 0.2 seconds. Damage scales. Increased range and projectile speed. Werebear, Twister, Tornado synergies.
Elemental
Gust
Teleport stuns on arrival, soft points spent lower the cooldown (.5 seconds cap) (does not work while shapeshifted).
Artic Blast
Now is a level 1 skill, also has bigger hit box and travels faster, and is a part of the wind druid synergy toolkit.
Twister
Now grants additional twisters based on soft points (14 max twisters). No 'shotgun effect'.
Tornado
Hit box improved (bigger).
Firestorm
Increased AOE based on skill level.
Molten Boulder
Increased missile speed based on soft points spent.
Fissure
Density increased, cooldown reduced, next hit delay removed.
Volcano
Cooldown reduced, next hit delay reduced.
Armageddon
AOE decreased, fall rate increased.
Cyclone Armor
No longer a wind druid skill synergy. Small CD.
Assassin
Traps
Chain Lightning Sentry
Added skill at lvl 30. Chain radius same as sorc. Bounces up to 5 times.
Death Sentry
Only explodes corpses. Flat phys/fire damage. 5-10% corpse life. lvl 30.
Fire Blast
Extra missile per 4 hard point up to 6.
Shock Web
No next hit delay. Larger Ground spread.
Blade Fury
Pierces. Attack trigger time affected by attack speed. 100% weapon damage and no longer reduced by 2h weapons