I'm kind of curious, how is it worse in EW than ShB? I've felt healing in both to be largely the same. The only thing that has changed is encounter design, and only mildly at that.
WHM's only change was the addition of Lilibell and (in 6.1) bumping up the refresh rate of Lilies to 20 sec instead of 30 sec. Misery was DPS neutral in ShB and was made DPS neutral again in 6.1, so that's not really a change. (If anything, NOT doing this in 6.0 was an oversight due to a new tier of Glare and Misery should have just upgraded in potency with that same trait)
SCH's change is that Eos seems more responsive, there is still ghosting but a bit less, Fey Blessing had the Faerie Gauge cost removed, we gained Expedience (which was promptly nerfed for being too good), and...did anything else change?
AST lost Noct sect and got a pretty big rework, so I'll give you that if you're an AST main. It still plays vaguely like old Diurnal, but at the same time, not exactly. And the seals change still kind of boggles my mind. Like I get it's to reduce punishment for RNG not working with you, but you also lost all the nice tools to mitigate that RNG somewhat like using Minor Arcana to burn cards with the wrong seals or things like Sleeve Draw.
SGE was added, so can't really say much to that (since it's nothing like old Noct, so doesn't fill into that void as its spiritual successor)
So as far as I can tell, WHM didn't really change at all, SCH got slightly more responsive and a useful Zommies spell, and AST had to do the same babysitting before as now.
Not trying to harp on you, genuine question. I'm just not sure what you're suggesting changed, unless you mean encounters got easier (which isn't strictly a healer design problem), maybe?
EDIT:
I've always loved Resto Druid. Though I don't think Denji is saying EVERY LAST PERSON didn't like it - not every healer in FFXIV hates FFXIV healing, either. I think he was more saying that the game's community was still complaining about it even then.