Even if it gets nerfed it'll still feel stronger than warlocks just because of the base way in which the class works (atleast this expansion). What are they going to do? Nerf damage? They won't nerf it too hard for PVE implications, and I'll still have my utility which I enjoy. If they nerf the offheals I won't have a problem with that either, I never really understood why my instant flash of lights needed to heal teamates for 60% more than they'd heal me for. Those are the two things I figure they'll nerf and I'm good with that. On top of those nerfs I wouldn't even mind cooldown nerfs, which I honestly think is (combined with the offheals) what puts pallies over the top in arenas.
Imo warlocks need some core changes put into place to make them enjoyable again and I don't think we'll see that this expansion. But I've been wrong before. Imo they gutted lock utility which was the one thing that really made affliction unique and fun. That plus soul shards are a horribly unfun resource system. Here's to hoping blizzard is willing to undo some of the changes they've made.