Wall of text incoming, if it's too long I can edit and spoiler it.
Info can be kind of hard to find all in 1 spot on the internet so I am compiling a small list here. If they can pull all this stuff off, this game will be epic. Totally out of the left field. This is pretty much a totally new game, and Yoshi-P (the new lead dev) seems pretty enthusiastic about it and has played pretty much all MMO's ever released, and is really trying to take the best from all of them and spin them into the Final Fantasy world. Yeah most dev's talk bullshit, but it seems like we are getting an MMO made by a MMO player and enthusiast. I am hoping SE stockholders are keeping their hands out of it after the debacle that was 1.0. Hopefully they realize to just let the devs do their thing. Considering it was considered a failure, and this is a last ditch effort to redeem itself.
Here is a Non-NDA breaking compilation of info from these 2 vids and a few other public sources. This guy has tracked down tons of info from interviews, etc, and compiled them into these videos. Here is a summary of some highlights. Again all non NDA breaking info.
-PVP
4v4's, 8v8's, etc
Siege BG's
BG finder
Ability to spectate other players from their PoV for PVP (They are planning to copyright this, so assuming making a big deal out of competitive pvp?)
PVP Gear
Seperate PVP/PVE skillsets
-Combat
Combat supposedly gets much more advanced at 30+
Gradual increase in strategy
Will get longer cooldowns on higher level abilities
Will be limit breaks and group combo abilities
Will be debuffs, buffs, etc, and other non-damage abilities to balance into your rotation
Slower combat to allow for more party interaction/chat
-Housing
3 Sizes of houses
Guild and Personal houses
TONS of decorations, everything up to hottubs even
Can put raid bosses (ifrit's) head on your wall
Bonuses to your character like xp, crafting bonuses, etc, based on decorations
Can invite friends to houses
Can share houses
Can buy/sell houses
Instanced housing so it's not limited amount
Able to farm/garden outside your house?
-Raids
All 1.x raids, plus new 2+ new raids
Crystal tower, gauntlet type raid, with tons of levels with bosses every level, harder every floor
World bosses
World boss primals like Garuda, Ifrit, Titan, Leviathan, Odin, Shiva, Garland, Bahamut, Moogles, Ramuh, Fenrir, Cait Sith, etc
Some World Bosses are instanced?
Guilds can capture some primals and resummon them onto the world as bosses again(and unleash in pvp?)
Some capturable primals? (For Summoner class?)
16+ Dungeons at release including dungeon finder
FATE system kind of like Rifts/public quests
-Crafting
Crafter armor sets
Some rare recipes from raids
-UI
Modifiable UI, can move all windows around
UI just like your typical MMO, not console garbage
Can use a gamepad
-Classes
Plan to add new classes/jobs down the road, and possibly multiple job options/paths for a class
Producer said he would like to add thief, ninja, blue mage, red mage, dark knight, and samurai at some point
Class quest chain unique for every class
-Items
Tons of new items and armor sets
Can save items to "classes" so it doesn't take up all your bag slots
Materia system (like gem system in wow)
Players have elemental resistances, possible resist gear?
-Guilds
Guilds called free companies
Also can join multiple linkshells, these are like alliance/chat rooms for players to get invited to, can have more than one
Guild housing
Can customize your free companies crest
Fill a gauge? (Guild XP?)
Guild can summon raid bosses (and unleash in pvp?)
-Engine
All new graphics engine
New character creation
DX11 features coming
Ability to jump
-World
Entirely new handcrafted world, no copy/paste
Every zone is redone other than cities
Tons of new zones including snow areas
Holiday events and items
Mail System
Auction house
-Chocobos
Players can breed chocobos
Chocobos can be used as mounts and combat companions
Can level/spec and gear your chocobo with armor sets
Can make them healers, tanks, dps, etc
Vanity Chocobo items
-Misc
Magitech mounts
Can get credit for helping other people kill a mob
NM's (rares) spawn in the FATE system, and everyone that helps kill it gets a chance at loot (Similar to WoW LFR loot system)
Achievements
Vanity slots
Vanity pets
Gold Saucer (From FF7) coming after release. Will be a minigame/amusement park area with tons of stuff to do.
Reputations/ranks with each city called Grand Companies, with item rewards, etc