I would argue that one of the morphs of this skill is utterly useless both in pvp and pve. Healing thicket is the better morph, offering a lingering heal over time to anyone that leaves the area. This is perfect for anyone going through a breach or anyone being ulti dumped, because they will most likely have some DoTs on them as they attempt to leave the red area. Enchanted Forest does not offer much compared to Healing Thicket. This ultimate is meant to be cast preemptively and not as a last resort. It does not have the burst potential to outheal an ulti dump. It must be used in tandem with other heals. That being said, the ultimate generation of the Enchanted Forest morph is not attractive enough to warrant slotting it over Healing Thicket. This skill will never be used as a first response heal. Blessing of Restoration has a higher burst heal and it heals everybody in the area, and it grants them armor as well. BoR will take all of your allies out if execute range, while Enchanted Forest will only save one person. That being said; since Enchanted Forest will almost never be used on low-hp allies, this morph is useless in combat situations.
Proposition:
This useless morph can see a brighter future if it were changed to be a souped-up version of Corrupting Pollen. Keep the heal over time, but add debuffs to it. Add debuff synergies to it. Make it a corrupting forest that weakens the enemy's stats. Perhaps a synergy that inflicts Major Mangle to enemies. Or a synergy that eats the enemy's ultimate. I'm sure something creative can be thought of to match the theme of an Enchanted, Corrupting Forest.