Blood Price feels undertuned for single target, probably because it easily gets out of hand in AoE. BP ticks are 0.05DA to BW's 0.2DA, so once you get above about 4 mobs or so, the MP/blood generation becomes very quick. You gain resources faster than you can spend it.

The nerf to DP in single target is unfortunate, but now it's basically your AoE alternative to DA C+S. I had to re-keybind it to force myself not to hit it in single target out of muscle memory.