UPDATE:
Following is what I believe are the complete changes that were announced in the
(Note that these are not the official patch notes, also please excuse the spelling/inconsistent wording, I was frantically writing this down live).
NEUTRALS
Dorregaray –> 6 Power / 6 Prov
Aguara –> 8 Prov
Bombs: Dancing Star –> 4 Prov
Dimeritium Bomb –> Damage 4
Red Haze –> 4 Prov
Vaedermakar –> 6 Prov
Maxii van Dekkar –> 5 Prov (first Gold unit with 5 prov)
Regis –> 3 Power
Scorch –> 11 Prov
Yennefer of Vengerberg –> 10 Prov
Yennefer: Conjurer –> 9 Prov, now has zeal
Xavier Lemmens –> 6 Prov, now has Zeal, Banish 1 card from graveyard (melee: opponent, ranged: own), Cooldown: 1
MONSTERS
Overwhelming Hunger leader –> Now only 2 Charges, spawned Ekimmara –> 3 Power, now has 15 Prov
Viy –> 7 Power / 14 Prov
Bridge Troll –> 4 Prov
Rotfiend –> 5 Power
Harpy token that spawns from Deathwish via the Harpy Egg now 6 Power
Katakan –> 5 Power
Phooca –> Now Thrive 2, no Armor, no longer has Veil
Idr –> 7 Prov
Wild Hunt Hound –> 4 prov
SKELLIGE
Lippy –> 3 Power, 11 Prov
Haern Caduch –> Order now heals by 2
Brokvar Hunter now locked to Ranged Row
Djenge Frett –> 7 Power, 6 Prov
Giant Boar –> 6 Prov, ranged ability can now target allies
Heymaey Flaminica –> 6 Power
Hym –> 7 Prov
Olaf –> 10 Power
NORTHERN REALMS
Pincer Maneuver –> 16 Prov
Archgriffin –> 6 Power, 9 Prov
Griffin Witcher Ranger –> 2 Power, Formation, Deploy can now target enemy row for boosts
Margarita –> 6 Power / 6 Prov
Reinforced Trebuchet now has Crew: Damage a random enemy by 1 (enemy can be on any row)
SCOIA'TAEL
Novigradian Justice: now requires setup, Cleaver's muscle now only spawns if you already control a Dwarf or Crownsplitter
Call of Harmony Leader now has 16 Prov, Dana has 7 power
Cat Witcher Saboteur–> 4 Power
Cat Witcher –> Adrenaline: 3
Ciaran –> 5 Power, 6 Prov
Barclay Els –> 6 Prov
Iorveth –> 4 Power
Iorveth's Gambit –> 12 Prov
Morenn –> 5 Power, 6 Prov
Vernossiel's Commando –> 4 Prov
NILFGAARD
Imprisonment Leader now has 16 Prov
Alba Pikeman now has Bonded: damage a random enemy by 1 (enemy can be on any row)
Auckes –> 6 Power/6 Prov
Experimental Remedy –> 5 Prov
Vypper –> 8 Prov
SYNDICATE
Salamandra Mage –> 5 /5 Power/Prov, Tribute 4: Damage 3 adjacent units by 2, whenever you pay a Tribute ability, gain 1 coin; Adrenaline 5: Cain 2 coins.
Salamandra Lackey, first time you gain a coin each turn, boost self by 1
Madame Luiza now has Tribute 3: Gain zeal
Kurt –> 6/6 Power/Prov, Deploy melee: place bounty on enemy unit, ranged: purify unit
Collusion –> 10 Prov
Failed Experiment –> 10 Power
Fallen Rayla: Adrenaline 3 –> 5
Salamandra Abomination: Adrenaline 4 –> 6
OTHER FIXES
Players can now click order on Dol Dhu Lokke even when no units are left on the board.
Playing Syanna's order into Matta Hu'uri now correctly draws 2 cards.
Units with vitality/bleeding that are veiled can no longer receive additional vitality/bleeding.
Source: https://www.reddit.com/r/gwent/comments/lfd7ru/complete_list_of_balance_changes_for_82/