Undocumented changes for 7.1.5 (not found in official patch notes)
Legendaries:
Blingtron 6000 Gift Package can drop Legendaries
Legendaries are no longer colliding when swapping equipment sets
Prydaz no longer makes any noise and the animation has been changed
Miscellaneous:
Reflecting prism can no longer be used on everyone in your raid group, only the people in your party
'Word' enchants are now uncommon (green) quality instead of rare (blue)
Lockboxes now drop randomly in the broken isles. Requires 550 skill to open
You are no longer be able to put Artifact Power into an already maxed out (54 trait) weapon
There is now an Ahead of the Curve Achievement for Helya
Curious Coin droprate from Emissary chests increased
Secondary Stat Squish. Read more here
http://www.wowhead.com/secondary-sta...in-patch-7-1-5
Emissary chests do not generate loot until opened
Draemus in Dalaran sells Boon of the Zookeeper shoulder enchant
Class Hall Upgrade research times were cut in half
Trial of Valor
Guarm now knocks players up (higher) when he leaps
Twice as many Decaying Minion spawn in P3 of Helya
The durations of the Orb of Corrosions in P3 Helya are now shorter
Death Knight
Death grip procs Sephuz
Changed the Bonestorm Icon.
You can now jump with Wraith Walk!!!
Demon Hunter
Max reduce of Unleashed Demons (Havoc meta) is now 100 sec (down from 120s) - Goes 20/20/20/15/15/10
Sigil of Chains radius increased to 10y, from 8y
Blur does not reset Fel Rush anymore
Druid
Travel form reduced to 80% speed increase, instead of 100% <BUG> FIXED
Druid Glyph of Flap works with Glyph of stars
Hunter
Max reduce of Quick Shot is down to 52s (from 60s). Goes 10/10/10/8/7/7
Marked Shot costs 25 instead of 30
Mage
Summon food alone summons Mana Buns now, the same as the table gives everyone, not Mana Pudding
Paladin
Blade of Wrath proc for Ret Paladins now has a visual effect
Priest
Sphere of Insanity no longer makes any noise
Rogue
Max reduce of Master Assassin (Vendetta) is down to 48s (from 60s). Goes 10/10/10/8/6/4
Shaman
Resto shaman legendary gloves now correctly interact with healing stream totem
source: https://www.reddit.com/r/wow/comment...ented_changes/
Please add if you have found anything else!