I think a lot of people are comparing pre ShB healing geared characters to healing new dungeons in levelling (low) gear post ShB. on top of the fact that SE have said more healing will be required for all healers, it should be expected that healing is tougher than it was before. it has been designed that way. Reading posts where people are complaining that they are having to use Essential dignity (ED) and light speed to heal the tanks is a baffling mentality - as that is what the spells are there for - to heal when its tough going . With the hyperspeed trait and 2 charges of ED from lvl 78 onwards - it makes lightspeed a 1.5 mid CD if we are using our ED spell regularly, which is a huge mana saver if used and not saved throughout the fight. Lucid dream will take some getting used to to not be afraid to press it on its 1 min (and lower potency) CD, and we do have a lot of healing spells that cost no mana, so using and not saving them is important.
With more time healing i think having less to think about with the card system is not such a bad thing - although when in a dungeon with 2 dps both melee or 2 ranged can be annoying. sometimes having to minor arcana dps the tank!
using synergy i feel a lot of people forget about. Using that on the tank and healing them is a great HPS cooldown for tank healing heavy situations