Question regarding 5.2.1 Ishgard Restoration

I gathered enough mats to get all my Crafting Jobs to 70 with Ishgard Restoration.
However i'm not sure if i should wait until 5.2.1 in order to benefit the Ishgard Restoration or do it now.

Does anyone know if you will still be able to do the current turn-ins when 5.2.1 hits or are they gonna be replaced with something else?

They hinted in the first 5.2 live letter that current Skybuilder materials may not have a use in 5.2 so I'm expecting new crafted items to be added that will use materials gathered in Diadem. I wouldn't suggest stockpiling any of the current Restoration items to hold until after patch release.