Two sides to this.
As much as I would love some real 'advanced' healing with ability to control potency.
FFXIV isn't advanced like that (enough) / just isn't.
So WHM adjustments (and in a way all other adjustments) are in a way, more 'as intended' to suit FFXIV's intended style/class design concept.
Which I believe is what's causing the restrictive feeling to players with diverse experiences in other MMO's.
So as much as I love the technical and advanced discussion of front load healing, net healing, over-healing and etcetera.
It's over the top for a game like this.