Word of GLory isn't the counterpart to Echo, FLash of Light is. Flash of Light heals at 203% spellpower. Echo pre-nerf healed at 200% in addition to the added ability to copy the next healing spell. Given that bonus ability, Echo was the vastly superior spell. Living FLame's healing was also in line with spells like Healing Wave and Heal, which had 2.5 cast times. Living Flame was actually somewhat better because it had a shorter cast time. I have no idea where you're getting the idea that these are bad healing spells. You could probably make that argument now that they've been significantly nerfed for some reason, but you couldn't make that argument just a day ago.
Yeah, that was demonstrably false. Again, they've been heavily nerfed in the last 24 hours, making Preservation healing weaker than it was before, so clearly Blizzard is seeing something that you're not seeing.None of the Evoker heals besides Rescue (lengthy cooldown) and Dream Breath are particularly strong or stronger than heals by classes that cover a 40 (or even 45) yard range.
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I was responding to your notion that higher HPS to offset range would make them OP. If that's the case, it wouldn't be the first time Blizzard intentionally made a hero class OP in their introductory expansion.