General:
Passive mana regeneration has been removed. Players must now return to an Aetheryte crystal to restore MP. This effect has a 10 minute cooldown period.
Due to player concerns over the use of the Duty Finder while companion chocobos are active, chocobos have been removed.
The game is now 10% harder in vague, nondescript ways.

Classes:
Due to fan demand about monks attacking with their bare fists, monk weapons and all of their benefits have been removed from the game. "Fists of Fire's" effect has been increased to 10% to compensate.
"Fists of Fire" has been removed. "Fists of Wind" now increases damage done by 10%, in addition to its other effect.
"Fists of Wind" has been removed.
"Twin Snakes" is no longer considered canon by Kojima.
"One Ilm Punch" now has a maximum range of one ilm.

The Scholar pets "Eos" and "Selene" now count as party members, similar to chocobo companions.
"Sacred Soil's" effects are reduced in areas without any soil around.
"Eye for an Eye" can now only be used twice.

"Presence of Mind" has had its cooldown increased to 180s, up from 90s.
"Stoneskin" now prevents the target from moving or taking any actions until it's removed.
"Presence of Mind" has had its cooldown decreased to 90s, down from 180s.
"Enhanced Raise" adds a 15% chance to be taken literally, raising the body higher and higher until it can no longer be targeted.
"Presence of Mind" has been removed. Damn it we don't know what to do with it!

Pressing the Jump key as a Dragoon now places all "Jump" skills on cooldown.
"Piercing Talon's" damage has been reduced by 5%.

Ninja characters who are present when the final boss of a dungeon is defeated are now automatically rewarded any loot that drops and are then removed from the dungeon.
Failing a Mudra combination now results in the rabbit slaying the Ninja.

"Bloodbath's" effect is reduced for every piece of clothing you have on. You can't bathe while clothed, silly!
"Enhanced Foresight" now allows a Marauder to see which party member will stand in the bad first.

"Swiftsong" is now sung 3% more swiftly.
"Mage's Ballad" now only functions on White Mage and Black Mage.
"Misery's End" now makes the user feel 30% less miserable.

"Hallowed Ground" now only works when standing in a Scholar's "Sacred Soil" effect.
"Flash" will now result in arrest if used in any city or near an Aetheryte.

"Apocatastasis" has had its effects changed to be more in line with its name. Surely we don't need to explain what the spell does now!
"Flare" now increases enmity against T-Rex enemies by 800% in addition to its current effects.

"Ruin" has received a new icon.
"Shadow Flare" now pushes targets out of its radius. This will make it easier for the tanks to always reposition the mobs so none of them stand in the AoE.