First off, I agree with the intent of -10% incoming healing. Healing is definitely too strong in pvp. I can heal through a lot of damage, too much damage, if I'm honest -- but that's because I've built my healer characters specifically for that. My healing builds are 100% healing. I can't do damage. I can't CC. If I cast something to synergize, it's likely just for more group healing. My healers are strong because that's all I do and that's how it should be. Healers should be just as important as people in the damage roles. -10% healing is tolerable, but why give it out for free when healers sacrifice so much?
Instead of a flat -10% incoming healing decrease across the board, I would much rather see a change to major and minor defile to be stronger at base -- in pvp only, which could included in the Battle Spirit effect. Increase both Major and Minor Defile by 10% when in pvp. (Which would actually mean a 20% healing nerf if used together, not including the defile CP options). But please, don't give out a constant nerf to healing for free. Like I said, when I'm on a healer, I build in order to heal. My healing is strong because I sacrifice damage, resistances, and often mobility. If my healing is an issue, encourage others to defile me and my groups more, and put more strain on us healers by increasing the defile effects. Make this healing change skill-based: make people keep their defiles up. An automatic, extra -10% healing doesn't encourage any type of skill. It doesn't encourage counter-play. It's just an unavoidable punishment.
Every class, except for sorcs, has a class skill that includes major defile. Werewolves constantly defile. Sword and board has a major defile bash skill. There are even sets that inflict Major Defile if you don't like the other options. Minor defile is as easy as putting a disease enchant on your weapon. Give sorcs a Major Defile on their Clannefear to make it interesting and useful, or some other skill so sorcs do have an option.
Defile can be purged. And yes I currently do, and I would, rush to purge it. But it's generally easier to recast your defile than it is for me to purge it. Purge is not cheap. So dark flare me to death, nail me with a CC and I'll be hurting already even without these proposed defile changes.
Despite primarily playing as healers, I do welcome decreased healing. It makes sense. Healing is very strong. But players should build to counter me, just as I build to counter their damage. That's the only fair way to do this change. Am I wrong?