Patch 29.6.1 is a serverside hotfix rolling out today with the following updates and bug fixes.
Battlegrounds Updates
Armor Updates
The following Heroes have been adjusted to have less Armor:

YoggSaron, Hope’s End now has 5 Armor, and 2 Armor in Duos.

Maiev Shadowsong now has 5 Armor, and 2 Armor in Duos.

Cap’n Hoggarr now has 5 Armor, and 2 Armor in Duos.

Doctor Holli’dae now has 5 Armor, and 2 Armor in Duos.

Ini Stormcoil now has 5 Armor, and 2 Armor in Duos.

Alexstrasza now has 5 Armor, and 2 Armor in Duos.

Rakanishu now has 5 Armor, and 2 Armor in Duos.

Queen Azshara now has 5 Armor, and 2 Armor in Duos.

Chenvaala now has 5 Armor, and 2 Armor in Duos.

Lich Baz’hial now has 7 Armor, and 4 Armor in Duos.

Death Speaker Blackthorn now has 7 Armor, and 4 Armor in Duos.

Vol’jin now has 8 Armor, and 5 Armor in Duos.

Skycap’n Kragg now has 8 Armor, and 5 Armor in Duos.

Elise Starseeker now has 8 Armor, and 5 Armor in Duos.

The Curator now has 8 Armor, and 5 Armor in Duos.

Greybough now has 8 Armor, and 5 Armor in Duos.

Reno Jackson now has 8 Armor, and 5 Armor in Duos.

Professor Putricide now has 10 Armor, and 7 Armor in Duos.

A.F. Kay now has 10 Armor, and 7 Armor in Duos.

Sneed now has 10 Armor, and 7 Armor in Duos.

Overlord Saurfang now has 10 Armor, and 7 Armor in Duos.

Patches the Pirate now has 10 Armor at higher ranks, 5 Armor at lower levels, and 7 Armor in Duos.
The following Heroes have been adjusted to have more Armor:

Trade Prince Gallywix now has 10 Armor, and 7 in Duos.

Galewing now has 13 Armor, and 10 Armor in Duos.

Millhouse Manastorm now has 15 Armor at higher ranks, 18 Armor at lower ranks, and 12 Armor in Duos.

Master Nguyen now has 15 Armor, and 12 Armor in Duos.

Murloc Holmes now has 15 Armor, and 12 Armor in Duos.

Tamsin Roame now has 15 Armor, and 12 Armor in Duos.

Xyrella now has 18 Armor at higher ranks, and 15 Armor at lower ranks and in Duos.

Heistbaron Togwaggle now has 18 Armor, and 15 Armor in Duos.

Mutanus the Devourer now has 18 Armor, and 15 Armor in Duos.

Scabbs Cutterbutter now has 18 Armor, and 15 Armor in Duos.

Al’Akir now has 18 Armor, and 15 Armor in Duos.

Dancin’ Deryl now has 18 Armor, and 15 Armor in Duos.

Varden Dawngrasp now has 19 Armor, and 16 Armor in Duos.

Fungalmancer Flurgl now has 20 Armor, and 17 Armor in Duos.

Rokara now has 20 Armor, and 17 Armor in Duos.
XP Update
The maximum XP per Battlegrounds turn has been slightly increased to account for the potential for extremely long combat phases.
Bug Fixes and Game Improvements

[Hearthstone] Fixed a bug where cards that upgraded Hero Powers didn’t work with the Boulderfist Ogre Hero Skin.

[Hearthstone] Fixed a bug where Harth Stonebrew was messing up his iconic hands. C’mon, Harth—they’re iconic.

[Hearthstone] Fixed a bug where Symphony of Sins’s Movement of Envy destroyed all the cards in one batch, instead of one at a time and in order (like Wheel of DEATH!!! does).

[Hearthstone] Fixed a bug where Rocket Hopper triggered effects that count Overload triggers, like Jazz Bass, twice.

[Hearthstone] Fixed a bug where Disco at the End of Time sometimes didn’t fill the Secret Zone (again—we were stuck in a time loop with this bug).

[Twist] Updated Xyrella’s Hero Power to now win the game when you reach your max health, instead of specifically 60 health (relevant when max health is adjusted by cards like Azerite Snake).

[Twist] Fixed a bug where Arfus’s Passive Effect couldn’t generate Azerite Dragon or Azerite Murloc.

[Twist] Fixed a bug where one of the Treant tokens generated by Omu’s Hero Power had Taunt.

[Twist] Fixed a bug where Rafaam’s effect didn’t discount noncollectible Legendary cards (those with the Legendary frame, but no gem, like the Astalor generations).

[Twist] Fixed a bug where Rafaam’s Hero Power didn’t discount cards set to 1 mana with Jepetto Joybuzz.

[Twist] Fixed a bug where N’Zoth’s Hero Power could generate nonminions.

[Twist] Fixed a bug where Secrets generated by Kael’thas Sunstrider’s Passive Effect would disappear even if you played them.

[Twist] Fixed a bug where Leeroy’s Passive sometimes wouldn’t apply to enemy cards that set costs, like Mes’Adune the Fractured.

[Twist] Fixed a visual bug where having a Golden Hero Class (500 ranked wins) didn’t result in a Golden Passive effect (or minions summoned from it).

[Twist] Fixed a visual bug where cards generated by a Golden Hero’s (having a Golden or better unlock card) Hero Power and Passive were not Golden.

[Battlegrounds] Fairy Gillmother can no longer generate herself with her effect.

[Battlegrounds] Fixed a bug where Darkmoon Prizes didn’t count as even or odd for Greymane’s Champion and Mooneater’s Champion.

[Battlegrounds] Fixed a bug where Goldenized Zilliax: Bonding Module didn’t have its Magnetic effect.

[Battlegrounds] Fixed a bug where inhand ‘Loc Prince gained stats from being summoned by Bassgill’s effect.

[Battlegrounds] Fixed a bug where ’Loc Prince didn’t keep its own stats when getting a permanent incombat buff.

[Battlegrounds] Fixed a bug where Spiked Savior’s extra Deathrattle trigger (from a Titus Rivendare) triggered after their Reborn.

[Battlegrounds] Fixed a bug where Golden Magnanimoose wouldn’t summon minions correctly if it had been Reborn.

[Battlegrounds] Fixed a bug where Elise Starseeker’s Buddy only discounted her Hero Power once in Duos.

[Battlegrounds] Fixed a bug where The Nameless One’s Buddy wouldn’t work with Rylak Metalhead if your Duos Partner changed their Hero Power.

[Battlegrounds] Fixed a visual bug where playing a Blood Gem on Golden Geomagus Roogug would send Blood Gems off into the stratosphere.

[Battlegrounds] Sped up ‘Loc Prince’s visual effect.

[Arena] Fixed a bug where the same card could be offered twice in the same draft pick.

[Collection] Fixed a bug where if you had the Golden version of Vicious Slitherspear in Wild, it didn’t grant you the Golden version in Core.