Mm. I'm not sold he is Blofeld to be honest. And in the pictures, I'm fronted with more questions:
1) Why hasn't the man at the head of the table got 2 "minders" like everyone else at the sides has.
2) Waltz, in the official picture', certainly is at the side. There is a man on the door behind him like there is with everyone else in the overhead shot, behind the 2 "minders". I am 90% confident Waltz is not at the head of the table that we can't see.
3) The chap at the head of the table doesn't seem to have a headphones. Waltz does. I would have thought if he was heading, he wouldn't have the headphones and they would be for those listening.
4) A reveal may be for dramatic effect for Bond to see it's a person from his past etc, not necessarily for our benefit for a big 'Blofeld' style reveal from the shadows. Bond sees it's Oberhauser and a few pieces of the puzzle fall into place for him, not us.
He may well be "head" of a certain section or even a #2 figure. Early days I know, and it's just my theory, but at present I don't think he's the head.