Job Wheel!

[Kaiyoko]

Evoker > Summoner?
Arcanist > Scholar?

My theory is that the addition of SCH was to make a second healer job (since for levelling up in groups of 4 there's going to be a huge lack of them), and from what we know about ACN it just wouldn't fit the bill =/

^This. Pretty much what myself and the hauby we're discussing when the picture was released. And yeah- with WAR already have been confirmed @ NicoNico to fullfil a more 'tanky' role in ARR. We're looking at 2tanks, 1healer, and chalk full of DPS.

From a design point it makes sense to have an additional job (SCH).
(And I hardly think ARN could fulfill a full support healing role. Anyone who was lucky enough to view the placeholder ability list before SE took them down would have a general idea of where that class gameplay will fall)

OFCOURSE anything and everything has been stated again and again "under development" and could change for release. So perhaps summoner/archaist just took a major turn we've yet to be informed about.