Just a thought as I try to build a dedicated healer.
Dryad’s Blessing would make a lot more sense if it was a group healing effect. Even if it got nerfed a little to compensate.
The only other constellation that group heals IIRC is Healing Rain, which requires getting hit and costs a lot of devotion points to access.
Thoughts?
GD is a single player game. Most people play it that way. Nerfing Dryad´s Blessing would punish 99,99% (about…) of players. No thank you.
Healing Rain is not exactly group heal, I am pretty sure it´s aimed at pet builds. Just saying.
to make a dedicated healer with group heal…
Well first you go demolitionist to support your group with all possible buffs/debuffs. Then you either grab Occultist with Blood of Dreeg or Shaman’s Wendigo Totem + mogdrogan’s Pact.
Healing Rain is all you need. Also look for very specific gear/items.
Short answer - no
Long answer - all you need 4 group healing is healing rain from a tree of life.
Well, GD is multi-player and many people do in fact multi-play but I certainly would’nt want to punish 99.99% of anyone who loves GD.
I understand it is not exactly a group heal because as I stated, it doesn’t group heal. Unless I am mistaken it doesn’t heal pets either.
It seems to me that there are several constellation healing options for the single player besides Dryad’s Blessing (circuit break and on attack) but there is ZERO group heals on attack.
Appreciate your opinion though.
GD is a single player game with a multiplayer/coop option.
Healing rain is a AoE-Heal, I think. The visual effect is very subtle though.
So it should be actually quite good as group heal, if people stay close together. Maxed healing rain should be enough to keep the group alive, unless you build glass cannons. 
Melee + cooldown reduction + shaman (wendigo + mog pact) + occultist (mending raven pet and blood of dreeg) + healing rain combined is best healer
As everyone says it is single-player focused game (mostly). There are no challenges in multiplayer that require a dedicated caster or debuffer (unlike in D3 for example). Multiplayer is just too easy as it is.
A close-minded answer because you do want it not only for challenges ahead but also because you wanna feel or play as specific role in a team. Joy of being healer comes from wow for me and people want to get close as possible to it in a game they like.
Like everyone said, GD is mostly a singleplayer game. And because of that, the game is designed to have easily accesible self-sustain mechanics like “Health Regeneration”, “X% of Attack Damage Converted to Health”, and Devotions like Dryad. Dryad is a alternative mainly designed to help ranged characters (especifically mages) that try to avoid damage to have a chance to stay in the fight if they take it somehow.
Healing Rain is the only exception because they designed it for pet builds.
If they wanted GD to be a dedicated multiplayer experience, they would had included a healer mastery of sorts since the begining, instead of relying solely on devotions to do the job.