What Weapon Should A Blue Mage Use?

[Claire_Pendragon]

But Return to Ivalice was created by Yasumi Matsuno, creator of Ivalice. What now?

You quoted the part about FFX and FFVII.

On a side note, Yoshida already established the connection of Ivalice, but they brought him on, so that the details would be fleshed out in the 24man content so it would give off a more authentic Ivalice feel.
And remember, the creators themselves said its not the actual Ivalice of prior games, when it comes to making future ivalice games, they wont say "FF14 was its future". But it IS the past to FF14, with something like 80-90% of Ivalice happened.