This information is extremely old.

I love his idea for summoning primals because in-game they are pretty much deities so it makes sense that they would be a big thing and the world's weather changing sounds awesome.

Summoner will still be around and will summon lesser beings, they've said so a million times already. Stuff like Carbuncle and if the 2.0 concept art is any indication, Fenrir and Cait Sith.