edit: Much easier to read syntax here
https://www.wowhead.com/diablo-4/news/unofficial-diablo-4-server-slam-0-9-patch-notes-332908
Druid
They buffed Druid companion base active damage but heavily nerfed the companion legendary (from “companions gain 100-150% bonus damage” to “10-20%”).
Companion passive damage hasn’t been changed though, so passively they will still be as useless as ever (not to mention the dumb ai where they don’t attack most of the time).
Nerfed Tornado Seek enemies legendary from 1-5 to 1-3 enemies as well.
They heavily nerfed the unique Amulet Melted Heart of Selig, from 100% resources increase to 30%, makes it not worth it anymore.
They nerfed Druid’s Perfect Storm key passive as well. Not sure why, it wasn’t even OP.
They nerfed Druid’s abundance passive, from “basic skills generate 10% more spirit” to “6%” per rank.
They nerfed Wild Impulses from “15% more spirit cost for 30% more damage” at rank 3 to “9% more spirit cost for 15% more damage”.
They nerfed Predatory Instinct from “3% crit chance to close enemies” to “2%” per rank.
Lot of nerfs to offensive and defensive aspects.
Overall Druid received more nerfs than buffs.
Sorc
Huge nerf to damage mitigation and cooldown reduction.
Huge Hydra nerf.
Rogue
They nerfed Rogue’s Advanced Twisting Blades cooldown reduction from 1-3s to 0.25-3s.
Twisting Blades aspect damage nerf.
Huge nerf to Countering Dark Shroud.
Shadow Imbue energy sustain nerf.