I was looking at the spell list from the beta and I noticed the huge drops in mana cost. This has to mean a reduction in our regen ability or a big increase in what base mana we have relative to mana from int. Maybe a return to the 5second rule or just straight boost to OOC regen?
I think*blizzard*was happy with healing at the start of Cata when you went OOM from time to time.*