Unfortunately due to the recent discord attack, the most recent changelogs were lost. But let me do just a general overview. This list is in no way comprehensive:
NPC Bots
Added chattiness to NPC bots for interrupts and large group pulls.
Players can now greet their bots with simple greetings.
Mages now offer portals through chat or their gossip window, provided you have a rune of portals.
Paladin bots will cast "DI" (Divine Intervention) or "Salvation" on players upon receiving chat messages like "DI me" or "Salv me".
Murky's New Interactions
Murky can now find inconspicuous chests nearby.
Interacts with certain zones, NPCs, quests, etc.
Old Quality of Life features are pending implementation.
Class Tweaks
Destro Warlock and Arcane Mage have seen tweaks to abilities.
Slow is now baseline for Arcane Mage, replaced with Touch of the Magi.
Chaos Bolt for Destro Warlock now deals increased damage to targets below 35% health.
Elven Ret offhand damage slightly reduced via talents.
Colossus Smash is now a personal damage increase for target creature @ 20%.
Dungeon Revamps
Dungeons up through LBRS revamped with new boss mechanics.
Work in progress on Strath, Scholo, and UBRS.
Considering making AQ20 and ZG 10-man raids. Feedback is welcome.
Made small tweaks to Smolder.
Mind Control orb for first boss in BWL no longer has a CD.
Racial Abilities
Removed traditional racials from all races.
Introduced Heritage Horizons system for choosing racials.
Profession racials now have a cooldown for swapping.
New "racials" added to the system, with more to come.
Items
A number of items have been converted to currencies (scourgestones, darkmoon faire tickets, etc).
Bag spaces have globally increased by two.
Some other items have been reclassified as reagents for use in reagent bank.
More reagent banks have been placed in the game.
Item stacks for many reagents have been increased to 200.
Professions
New profession items added for Inscription and Enchanting.
Timbermaw has a new revered Alchemy recipe available.
New Quests
A new BFD quest from Kloveriell in Stormwind.
Instance Challenges
Corpse Explosion is now available as an instance challenge.
Reward structure for additional Reward Points has been implemented on some later bosses starting with ST and Mara
Cleaned up some of the code.
Reforging
Attack Power can no longer be converted into strength or agility.
Fixes and Adjustments
Various fixes implemented.
No longer need to type out DELETE when deleting a Rare+ item.
Spatial Rift is no longer usable in wsg.
Teleport menu is disabled by default on Dinklestone.
