Whm still has plenty of tools at their disposal. Still get freecures, still got better protect/stoneskin, still got very useful job abilities. Shields and fairy combined with any medica and relatively frequent divine sealed heals will still be great. It'll be okay lol

p.s. and that's not even mentioning that lb will fill slower if use the same class in a party(if youre overgeared for a fight then obviously that part wont matter).

Just my honest opinion on the 2 healers.