I don’t see how,
Wiz 3 > Ele 3 is still strong and can probably wear Ice Necklace.
Wiz > Pyro or Cryo > Ele or other things also become viable.
Please notice: Wizards are considered WEAK overall when not supportive (Chrono or Linker).
Necklace, currently, can give you +13~14 CON&INT (Max Pet/Terra) or ~100+ matk (Animus), honestly, even if you are a more diversed Wizard, Necklace is one of the less problematic places for you to have “fixed” gear, if those were weapons everything would be WAY more problematic.
These necklaces make Quickcast’s attribute (Wiz 3) LESS mandatory for DPS Wizard classes, but unless we get something like that for Dark spells, FF and Warlock seem doomed somehow when compared to even the new version of Pyro.
Also I don’t think this is such a big problem, it might be huge thing right now but is most likely going to be less important at rank 9/10.