Blizzard planned four class changes for Tuesday 10 November: Hunter pets and Warlock Voidwalkers get tougher, Affliction's DoTs become worth casting next to Wrack, and Strength becomes Enhancement Shaman's best stat. Community manager Kaivax announced them on 6 November in Class Tuning Incoming. He gave no numbers and no time of day.

Update, 12 November: the changes are live. Blizzard's hotfix notes for 10 November list the numbers:

Who What shipped
Enhancement Shaman Stormstrike 150% → 100% weapon damage, cooldown 6 → 8 s, Maelstrom Weapon down to 6–10 procs a minute. See the Enhancement nerf
Hunter pets Health set to 115% of normal, down from 150%. See the pet change
Warlock demons Imp, Voidwalker, Incubus and Succubus base health up about 15%
Affliction Warlock Wrack reworked: 30% less damage, DoTs tick twice as fast while you channel. See the Wrack rework

Everything else from 10 and 11 November is in hotfixes 10 and 11 November. The plan as Blizzard first described it is below.

What's changing

Who The problem Blizzard named The plan
Hunter pets Not sturdy enough to tank enemies Stats adjusted to about Classic Era levels
Warlock Voidwalker Same as pets Same as pets
Affliction Warlock Channeling Wrack nonstop beats also casting Siphon Life, Corruption and Bane of Agony Make those DoTs worth casting alongside Wrack, total damage unchanged
Enhancement Shaman Intellect and spell power beat Strength and attack power Make Strength always the best stat

Hunter pets and Voidwalkers

Blizzard wants pets to hold enemies about as well as they did in Classic Era. The Voidwalker already got more base health in the 6 November hotfixes, so this is a second step. See hunter pets by family and Warlock pet health.

Affliction Warlock

Right now the strongest thing an Affliction Warlock can do is channel Wrack and ignore the other DoTs. Blizzard says it will change that without raising or lowering Affliction's total damage. In practice, expect your rotation to go back to keeping Corruption, Siphon Life and Bane of Agony up and filling with Wrack. A separate 6 November fix already stopped Soul Siphon from making Wrack boost itself.

Enhancement Shaman

Blizzard says Enhancement should never want Mage or Warlock gear. Strength becomes the best stat, and its ideal items carry Strength or attack power with a bit of Intellect or spell power. Kaivax's advice to anyone leveling an Enhancement Shaman now: start collecting Strength and attack power gear. Our Enhancement page and Shaman weapons cover the rest.

More to come

Kaivax said class changes may land on later Tuesdays too, as more problems show up. Every confirmed fix goes on our known issues and hotfixes page, and what changed for every class covers Forever's bigger changes.