Metal Gear Solid V: Ground Zeroes TGS Gameplay demo

So here's 12 minutes of MGS V Ground Zeroes game play footage from TGS, for the most part it looks like the stealth gameplay style we're accustomed to in Metal Gear Solid, I hope the "tagging system" is for easy/very easy settings only!
My one major question is if Ground Zeroes leads up to the destruction of Mother Base and is the prologue to The Phantom Pain why doesn't Big Boss just use the Fulton Recovery system to extract the POW?!
The CQC system looks to be reworked, with a branching display of choices once an enemy is grabbed.
The weather effects are very impressive! The AI looks very aggressive once in alert status, the counter that goes from Alert to Caution seems to be gone...or maybe Big Boss avoided the alert by inhaling some slowmo....>:/