Interesting, but the problem with this sort of thing is that when curing you might as well sit in the back with a Staff - the only way I can see situations where a White Mage is main healing and meleeing is either if Mystic Boon was more powerful, or some weird combo of this idea and the next idea I have a reply to in this comment.
Another way you could go for healing though would be to take the MP saving effect from the pants as an aftermath effect for a Club WS. Considering how powerful the effect is I don't think we'll ever see it on another piece of gear, so this may be the only way we'll see more of it.
Can't believe I missed this somehow:
Divine Acumen! Paladins, White Mages, and Red Mages should get it.
Maybe even make it sub usable from White Mage and Paladin to give a more reason to use those as subs, especially if Red Mage gets left out of the loop again on job abilities...
It would probably work by MP spend like the others (and would probably work with Divine Magic nukes too). In a very unlikely setting, it could work by cure amount (if it was by cure amount, I'd imagine that White Mage would get lower tiers and Paladin would get higher tiers, but ultimately it wouldn't be very high at all, considering). Either way I have a feeling that White Mage's version of it might be boosted by Afflatus Misery, because then it might be useful outside of Esuna again.
These thoughts are all very rough and unpolished since I haven't really given much thought to a curing acumen ability.
Yeah, aftermath effects.
Aspir and dispel effects are very powerful so I'm not sure we'll see much of them but who knows. That said, on a dispel WS, I'd imagine the effect wouldn't be very potent considering how often you can stun it - you might be better off with a crossbow bolt that has a chance of it (and THF everywhere might like it more, I dunno). A Staff WS that reduces enmity would be a very nice touch though.
On AOE healing with a Club, it is more in line with what I wish the Emp Club did - currently the Emp Club gives a WS that seems more fitting for a PLD anyways (well, on a PLD I'd also expect it to have a massive enmity spike too). I don't think you'll see all the effects you suggested in one WS on Club though. On Clubs for Paladin in general, have you seen the Moepapa Mace, it is probably the best bet for PLD Clubbing currently short of getting the Emp Club itself.
Edit: Actually, Paladin could get an exclusive Shield WS that works regardless of the weapon in the main hand on getting like 400 skill in Shield. It would bash the enemy with the shield much like shield bash, but with more damage, and use the main hand weapon's damage rating along with the defense rating of the shield (I believe most cap out at 40) for great effect, and could have an additional effect of stun. Think of it like Shield Bash 2.0. This would make club Paladins very viable.![]()