Changelog of dota heroes of new maps 6.60b

Heroes
* Added a new hero Batrider to the Scourge
* Added a new hero Tauren Chieftain to the Sentinel
* Lightning Revenant: Reworked
* Medusa: Replaced Chain Lightning with a new ability Mystic Snake
* Medusa: Replaced Purge with a new ability Stone Gaze
* Netherdrake: Replaced Frenzy with a new ability Nethertoxin
* Rogue Knight: Replaced Toughness Aura with a new ability Warcry
* Rogue Knight: Reworked how Stormbolt works
* Rogue Knight: Improved Great Cleave damage (10/20/30/40->20/30/40/50 %)
* Slayer: Replaced Ultimate with a new ability Fiery Soul
* Twin Head Dragon: Replaced Autofire with a new ability Liquid Fire
* Troll Warlord: Replaced Rampage with a new ability Battle Trance
* Troll Warlord: Replaced Fervor Aura with a new ability Fervor (works like Beastmaster’s passive used to)
* Troll Warlord: Rebalanced Blind. Miss from 15/24/33/42 -> 20/28/36/44% and Cooldown from 8 -> 15/12/9/6 seconds
* Morphling: Reworked how Morphiling’s Adaptive Strike works
* Crystal Maiden: Replaced Frost Nova with a similar new ability Crystal Nova
* Phantom Assassin: Changed Blink Strike to a new ability Phantom Strike
* Ogre Magi: Reworked Multicast chance mechanism
* Sniper: Replaced Scattershot with a new ability Shrapnel
* Beastmaster: Replaced Beast Rage with a new ability Inner Beast (works like Troll’s old attack speed aura)
* Anti-Mage: Reworked Mana Void damage mechanism (now deals equal splash damage to units near the target)
* Anti-Mage: Undid recent buffs to base strength (21->16)
* Silencer: Recoded Last Word to properly detect animation canceling and silence after a spell is casted
* Treant Protector: Reworked Eyes in the Forest [details below]
* Admiral: Lowered Agility (18->14) and Agility Per Level (1.7->1.3)
* Axe: Lowered Base Armor by 1 point (2.8->1.8)
* Bane Elemental: Improved cast range on Enfeeble (800->1000)
* Bristleback: Improved Base Intelligence growth by 0.6
* Bristleback: Improved side angles on Bristleback (90->110)
* Bristleback: Returned the Bristleback passive Quill Spray release cap back (300->250)
* Broodmother: Changed spiderling’s armor type from medium to normal and now take damage from first towers (50->100 %)
* Crystal Maiden: Lowered Brilliance Aura (0.75/1.5/2.25/3->0.5/1/1.5/2)
* Dark Seer: Improved Vacuum cast range (600->800)
* Dark Seer: Lowered Ion Shell cooldown (15->7 cd)
* Dark Seer: Vacuum no longer goes through magic immunity
* Dark Seer: Vacuum now drags the units in over 0.3 seconds rather than instantly
* Death Prophet: Witchcraft no longer gives movement speed bonus
* Geomancer: Changed Poof damage (60/80/100/120->50/80/110/140)
* Geomancer: Lowered Poof cooldown (20/18/16/14->16/14/12/10 cd)
* Invoker: Improved Alacrity duration (6->8)
* Keeper of the Light: Changed Mana Leak stun into a slow (2 seconds, 60 %)
* Keeper of the Light: You no longer lose control of your hero when knocked back with Blinding Light
* Lifestealer: Removed the initial stun effect from Open Wounds
* Lion: Voodoo duration reduced from 1/2/3/4 to 1.25/2/2.75/3.5 seconds
* Lone Druid: Added Battle Cry to all level of True Form and scaled the bonus damage/armor (20/2->20/2, 40/4, 60/6) and lowered duration (10->8 seconds)
* Lone Druid: Changed Spirit Bear’s ability progression (Lv1->Adds Inventory, Lv2->Adds Return, Lv3->Adds Entangle, Lv4->Adds Demolish and Spell Damage Reduction)
* Lone Druid: Improved True Form’s melee attack range (100->150)
* Lone Druid: Rabid now goes on both the Spirit Bear and Lone Druid when casted instead of requiring a target
* Lone Druid: Removed One from True Form
* Lone Druid: Spells now last the same duration on Spirit Bear as they do on heroes
* Lord of Avernus: Lowered Death Coil cooldown (7->6 seconds)
* Lord of Avernus: Gets the Mark of the Abyss buff on his first attack instead of on his second attack
* Luna: Increased Lunar Blessing aura range (300->900)
* Magnataur: Lowered Reverse Polarity cooldown (120->120/110/100 seconds)
* Magnataur: Improved attack animation time
* Naga Siren: Reduced collision size (24->8)
* Naga Siren: Lowered Mirror Image cast time* Naga Siren: Lowered Mirror Image cooldown (50->40 seconds) and manacost (85/105/130/150 to 70/80/90/100)
* Necrolyte: Rebalanced Heartstopper Aura from 0.5/0.75/1/1.25% to 0.4/0.6/0.8/1% and range from 700/800/900/1000 to 1000
* Necrolyte: Lowered Strength per level (2.0->1.5)
* Obsidian Destroyer: Lowered Astral Imprisonment cooldown (20->18/16/14/12 seconds)
* Pandaren Brewmaster: Improved Fire Panda’s Immolation (10/10/30->15/30/45)
* Pugna: Life Drain max range improved by 50 and its cast range is now equal to its max range
* Rhasta: Voodoo duration reduced from 1/2/3/4 to 1.25/2/2.75/3.5 seconds
* Sacred Warrior: Removed the cap on Burning Spears
* Shadow Fiend: Improved Presence of the Dark Lord armor reduction (1/2/3/4->2/3/4/5)
* Shadow Priest: Lowered Shallow Grave cooldown (80/60/40/20->54/40/26/12 cd)
* Silencer: Lowered Last Word duration (1/2/3/4->0.75/1.5/2.25/3)
* Slardar: Slithereen Crush damage type is now Physical type
* Spectre: Restored some vision back to Spectral Dagger path
* Spirit Breaker: Improved AOE on Empowering Haste and added 2% more movement speed bonus
* Stone Giant: Craggy Exterior now gives armor bonus (3/4/5/6)
* Stone Giant: Craggy Exterior now triggers off of units with 300 range rather than just based on melee classification
* Templar Assassin: Changed Refraction duration/cooldown (20/23->17/17)
* Templar Assassin: Changed Psi Blades spill range (80/160/240/320->320) and attack range bonus (50/100/150/200->40/100/160/220)
* Templar Assassin: Refraction is now an instant cast ability
* Terrorblade: Now gets a movement speed bonus during Metamorphosis (+20)
* Tinker: Restricted Black King Bar from refreshing
* Twin Head Dragon: Rescaled Ice Path (0.5/1/1.5/2->0.8/1.2/1.6/2 seconds)
* Undying: Lowered Base Armor by 3 points (6->3)
* Undying: Tombstone no longer spawns zombies to attack fogged units
* Ursa Warrior: Rescaled Overpower from 100/200/300/400% IAS with 5 attack count to a constant 400% IAS with 3/4/5/6 attacks
* Vengeful Spirit: Improved Strength Per Level by 0.5
* Vengeful Spirit: Improved Command Aura range (450->900)
* Vengeful Spirit: Improved Wave of Terror a little and added some minor damage (25/50/75/100). Lowered AOE slightly (350->300)
* Vengeful Spirit: Now has normal Base Attack Time (1.77->1.7)
* Windrunner: Lowered Base Attack Time (1.6->1.5)
* Zeus: Arc Lightning becomes available for casting immediately after cooldown rather than wait for the Lightning to finish traveling. Cooldown increased from 2 to 2.5 seconds.

Among this changelog, some of heroes are balanced with other heroes already. Who is the most powerful heroes now? Who is your favourite heroes now?