I've said this time and time again before but...
Please, no more Druid mage (a.k.a. CNJ). I've had enough of Stones and Aero. That doesn't feel like the WHM I thought FFXIV WHM was going to be.
I was never a fan of White Mage being tied strongly to nature. I'd like holy elemental spells like Banish or Dia.

Also, rework Lillies and add buffs like Faith/Bravery/Haste which could use Lillies. Imagine being able to keep up Haste on someone almost indefinitely as long as you get the Lillies.
Perhaps if they 'remove' the need for Protect, they could add it back to WHM. Either as GCD which costs a lot (and by that, I mean, a LOT) that provides some protection to the whole party (it may be kept up for some time but you have to be mindful of MP and it should only be used in damage intensive parts of fights) or a oGCD like in PVP.