I don't see making one class the healer, and the other not, as making the two classes 'different' and 'unique.'
They could have done so without touching AoE toggle for both classes' healing abilities.
You just don't understand that by doing this, they've effectively cornered Con into the healing role. Before we could switch off with Thau's. And now? No one is going to want a thau to main heal a party. It doesn't matter if we can nuke, no one is going to want that with our poor damage the way it is, nor are they going to want that in exchange for a healer.

With Jobs (not classes) they could have added more abilities that cut spell costs, or spells that were job/class specific like an AoE raise for Con that affected at most 2-3 people. A DoT venom for Thau's. Better spike spells for thau's. The ability to AoE spells for thau's or SOMETHING.

Anything but cutting off one class from healing a party like they've done. Especially since this isn't like XI where you have a white mage and a black mage, COnjurer is a mix of the two, but this early in the game without any other healer options they may as well have cut out Conjurer's nukes.

WHICH MIGHT I REMIND PEOPLE
WOULD MAKE LITTLE SENSE
WITH THE CONJURER'S STORY LINE.
Just saying.