TheWoWDBWoW Forever Item Changes
Items in the WoW Forever beta client against Classic Era: 7,925 changed, 6,858 new and 13 dropped. This page lists the legendary, artifact and heirloom-quality items that changed. The epic items have pages of their own.
Compared file by file: the WoW Forever beta client 1.60.1.70124 against the Classic Era client 1.15.9.69722. This is what the beta client ships today and it can change before launch.
Legendary items that changed
"Stat slots added" means the beta client lists that stat on the item itself where the Classic Era client lists none. The numbers behind a slot are allocation weights, not the final value on the tooltip, so they are not shown. A stat id our database has no name for prints as "unnamed stat".
Atiesh, Greatstaff of the Guardian Legendary, item level 90
stat slots added: Hit, Spell Power- Atiesh, Greatstaff of the Guardian Legendary, item level 90
stat slots added: Critical Strike, Spell Power - Atiesh, Greatstaff of the Guardian Legendary, item level 90
stat slots added: Spell Power, unnamed stat - Atiesh, Greatstaff of the Guardian Legendary, item level 90
stat slots added: unnamed stat 
Elementium Bar Legendary, item level 60
also changed: max stack, subclass id
Eye of Sulfuras Legendary, item level 60
also changed: subclass id
Shard of the Defiler Legendary, item level 70
stat slots added: Haste, Critical Strike
Sulfuras, Hand of Ragnaros Legendary, item level 80
stat slots added: Fire Resistance
Talisman of Binding Fragment Legendary, item level 80
stat slots added: Fire Resistance, Nature Resistance- Talisman of Binding Shard Legendary, item level 80
stat slots added: Fire Resistance, Nature Resistance 
Thunderfury, Blessed Blade of the Windseeker Legendary, item level 80
stat slots added: Fire Resistance, Nature Resistance
Artifact-quality items that changed
Alex's Ring of Audacity Artifact, item level 60
stat slots added: Defense
The Twin Blades of Azzinoth Artifact, item level 100
stat slots added: Shadow Resistance, Arcane Resistance, Hit, Haste
Warglaive of Azzinoth (Left) Artifact, item level 100
stat slots added: Shadow Resistance, Arcane Resistance- Warglaive of Azzinoth (Right) Artifact, item level 100
stat slots added: Shadow Resistance, Arcane Resistance
Heirloom-quality items that changed
Emblem of Dishonor Heirloom, item level 1
also changed: subclass id
Emblem of the Violet Eye Heirloom, item level 1
also changed: subclass id
Emblem of the Wild Gods Heirloom, item level 1
also changed: subclass id
Emblem of the Worldcore Heirloom, item level 1
also changed: description, subclass id
Items whose quality changed
Astral Boots, Legs, and Shoulders Set Epic, item level 55
quality Common to Epic- Astral Gloves and Belt Set Epic, item level 55
quality Common to Epic - Astral Helm and Chestpiece Set Epic, item level 55
quality Common to Epic - Corrupted Boots, Legs, and Shoulders Set Epic, item level 55
quality Common to Epic - Corrupted Gloves and Belt Set Epic, item level 55
quality Common to Epic - Corrupted Helm and Chestpiece Set Epic, item level 55
quality Common to Epic - Dawn Boots, Legs, and Shoulders Set Epic, item level 55
quality Common to Epic - Dawn Gloves and Belt Set Epic, item level 55
quality Common to Epic - Dawn Helm and Chestpiece Set Epic, item level 55
quality Common to Epic - Divine Will Boots, Legs, and Shoulders Set Epic, item level 55
quality Common to Epic - Divine Will Gloves and Belt Set Epic, item level 55
quality Common to Epic - Divine Will Helm and Chestpiece Set Epic, item level 55
quality Common to Epic - Eruption's Boots, Legs, and Shoulders Set Epic, item level 55
quality Common to Epic - Eruption's Gloves and Belt Set Epic, item level 55
quality Common to Epic - Eruption's Helm and Chestpiece Set Epic, item level 55
quality Common to Epic; also changed: description - Feline Boots, Legs, and Shoulders Set Epic, item level 55
quality Common to Epic - Feline Gloves and Belt Set Epic, item level 55
quality Common to Epic - Feline Helm and Chestpiece Set Epic, item level 55
quality Common to Epic - Guardian's Boots, Legs, and Shoulders Set Epic, item level 55
quality Common to Epic - Guardian's Gloves and Belt Set Epic, item level 55
quality Common to Epic - Guardian's Helm and Chestpiece Set Epic, item level 55
quality Common to Epic - Immoveable Boots, Legs, and Shoulders Set Epic, item level 55
quality Common to Epic - Immoveable Gloves and Belt Set Epic, item level 55
quality Common to Epic - Immoveable Helm and Chestpiece Set Epic, item level 55
quality Common to Epic - Impact's Boots, Legs, and Shoulders Set Epic, item level 55
quality Common to Epic - Impact's Gloves and Belt Set Epic, item level 55
quality Common to Epic - Impact's Helm and Chestpiece Set Epic, item level 55
quality Common to Epic; also changed: description - Mender's Boots, Legs, and Shoulders Set Epic, item level 55
quality Common to Epic - Mender's Gloves and Belt Set Epic, item level 55
quality Common to Epic - Mender's Helm and Chestpiece Set Epic, item level 55
quality Common to Epic - Merciful Boots, Legs, and Shoulders Set Epic, item level 55
quality Common to Epic - Merciful Gloves and Belt Set Epic, item level 55
quality Common to Epic - Merciful Helm and Chestpiece Set Epic, item level 55
quality Common to Epic - Pursuer's Boots, Legs, and Shoulders Set Epic, item level 55
quality Common to Epic - Pursuer's Gloves and Belt Set Epic, item level 55
quality Common to Epic - Pursuer's Helm and Chestpiece Set Epic, item level 55
quality Common to Epic - Radiant Boots, Legs, and Shoulders Set Epic, item level 55
quality Common to Epic - Radiant Gloves and Belt Set Epic, item level 55
quality Common to Epic - Radiant Helm and Chestpiece Set Epic, item level 55
quality Common to Epic - Relief's Boots, Legs, and Shoulders Set Epic, item level 55
quality Common to Epic - Relief's Gloves and Belt Set Epic, item level 55
quality Common to Epic - Relief's Helm and Chestpiece Set Epic, item level 55
quality Common to Epic; also changed: description - Thrill's Boots, Legs, and Shoulders Set Epic, item level 55
quality Common to Epic - Thrill's Gloves and Belt Set Epic, item level 55
quality Common to Epic - Thrill's Helm and Chestpiece Set Epic, item level 55
quality Common to Epic - Twilight Boots, Legs, and Shoulders Set Epic, item level 55
quality Common to Epic - Twilight Gloves and Belt Set Epic, item level 55
quality Common to Epic - Twilight Helm and Chestpiece Set Epic, item level 55
quality Common to Epic - Unstoppable Boots, Legs, and Shoulders Set Epic, item level 55
quality Common to Epic - Unstoppable Gloves and Belt Set Epic, item level 55
quality Common to Epic - Unstoppable Helm and Chestpiece Set Epic, item level 55
quality Common to Epic
Charred Shaman's Notes
Enchanted Powder
Mystical Powder
Pattern: Warbear Woolies
Smudged Shaman's Notes
Torn Shaman's Notes
Waterlogged Shaman's Notes