Elemental Resistance change.

[SDaemon]

If SE would do this, why restrict it to crafted gear? Without the benefit of the added crit, det etc etc on crafted gear, dungeon/raid gear of higher ilvl is superior by far. So slapping the element materia on crafted gear is horrible for you unless they made the elemental materia incredibly OP.

First off I totally agree, elemental resistances aren't really a thing in this game because Yoshi-P wanted to make it so no one could get discriminated against based on the elemental damage they deal. While on the DEFENSIVE side this means everything is a bit oversimplified, it also gives leeway for the designers to create more interesting fights without absolute gear requirements. I've played games with resist gear. It wasn't as fun as people think it would be.
That said...
SMN actually wouldn't need much, their damage is unaspected.
BLM, WHM, and BRD all deal aspected damage, though the latter is physical instead of magical.

SMN can cross certain spells, like blizzard and aero. While it isn't really a staple to them, the fact that they can cast those spells impacts them too. (oh sorry, thinking of SCH w/ aero lol)