I only healed one instance (Shattered Galls heroic) with a PuG, my build is also full resto, I went for the "biggest heals" I could get. Meaning I took every talent that increases HPS and didn't focus much on mana efficiency talents (and that's why I didn't go with 8/0/53 or 11/0/50 builds).
My spell power is something like 1060 unbuffed in caster form, about 100 more in ToL form and self buffed (if it's easier for you in the old system, I had 2000 healing bonus before the patch).
About the heals:
Lifebloom, now ticking for about 640 fully stacked, was 778 earlier (I saw that number flash on my screen SO many times I know it by heart :) ), a decline of about 15-20%. Also notice the mana cost, about 50% increase there. I'd say the periodic healing of it was nerfed alot. The final heal seemed to increase but I'm not 100% positive about it, I rarely used it for that purpose.
Rejuvenation is ticking for about 1050, was 980 earlier, mana cost was reduced, not sure how much though.
Regrowth hits/crits seems largely similar, but the ticks have increased from 450 to something around 550. I'm not sure how did the poster above me get such high crits on it. For me it's 2200 a hit or so, maybe with the glyph (20% stronger initial heal if Regrowth is cast) and on a Warlock or a talented Rogue/Feral druid.
Healing Touch, IMO was largely buffed. Lost about 5% of it's healing power, but at a 0.5 reduced cast time. Finally we can deal with large DPS on a tank without losing ToL form.
Wild Growth, well alot more testing needs to be done on it, but I like it alot, having an AoE heal is really nice. Some things I saw is that if cast on a party member, and then again on a party member that is in range it will cancel the effect of the new one, though I think that if you cast it on someone, then on someone out of range and then they move near eachother both keep their original timer, I only tried it once, and I cast both Wild Growths right after another so the difference in end time was small and might have been my imagination, also I don't know which heals are counted as it was done on a fully healed party. As I said, needs more testing :)
My mana efficiency seemed to have dropped considerably(understandably since I did the run without glyphs and with a build that doesn't support it very much), but it also may have come from the need to use Healing Touch/Regrowth quite often as the tank (Druid) tanked all mobs at once, though he does overgear the place.
That's my first impression, can't say anything certain at the moment as I never did heroic Shattered Halls before so I have little to compare, also with the changes to Druid tanking it's hard to tell what to expect, even if it was a run I'm very familiar with.
For now I'm liking the changes, need to see Zul'Aman at sunday to be wiser.
Yuval.