Perhaps an adaption to Regrowth so that it was a 1.5 sec heal, it had its co-efficients changed so it was slightly more top heavy (75% instant, 25% hot, rather than the 50/50 it sort of is now), yielding an initial heal slightly worse than a Flash, and a shorter duration HoT after (10seconds at 2sec ticks for example) which would be slightly weaker than it is now.
It would be more viable in PvP, it would be more likely to be used in PvE due to the fact you dont need to wait 21 seconds after casting it to get past its rather horrid efficiency, perhaps a mana cost change so its more viable to be cast frequently too... ah well it wont change anyway, tis nice to dream however ^^

Double post, sorry.

While a basic class comparison breaks down when you consider forms, if we were to only look at talents considered important for healing in either PvP or PvE, you would find healing Priests have to spend worthless points investing in Disc to get the same basic talent as Intensity. This is without even considering the the world of difference between NS/Swiftmend and Spirit of Redemption/Lightwell in viability in PvE or PvP.

Were these DPS classes using rank 1 spells and grey weapons? Even if we assume a Priest could cast without any interruption (Martyrdom is always up, no stuns, no silences, no spell disables, no fear) then the Priest would be pumping out about 1000hps (1500hp Flash Heal every 1.5s, which is realistic for PvP gear and easy to calculate). Easily defeatable by even slightly competent teams. That is also assuming there are no wound poisons or MS debuff in this attacking group. We will also, though entirely unlikely, assume the group attacking the priest has no means of purging (leaving even PvP geared Priests with about 9% mitigation from armor and down more than 1000 hp for one cast).

My goal here isn't to suggest that a Druid would survive this onslaught better (though it is debatable with stamina heavy gear and Frenzied Regeneration or making a run for it by switching into travel form or Feral Charging away, or just avoiding being targeted at the start with stealth), only that no one has it easy in such bursty environments unless they can render themselves completely invulnerable. The problems of healing in PvP are not class-specific, but the result of damage generally scaling better than healing or protective gear/abilities. It is not an easy situation to balance - how long should a player, even supported by others, survive an assist train?

Sadly, in the games I've played that had extremely fun PvP, the answer to that question is forever, but that's a whole other WoW PvP is broken topic.

just recently read on blizzards forums that natures grace doesn't reduce cast time on cyclone

That almost definatly ruins my 21/0/40 build im was hoping for.

I expect treeform to get a very solid overhaul. It is not just PvP, but can you imagine trying to heal a heroic just using the spells you are limited to? It just doesn't work.