Presumably with the increased damage, blood boil is intended to be the AoE aggro tool for blood tanks

Which isn't possible if you also want death and decay down.

If you're a DK tank and you're throwing down Death and Decay, you need to stop trying to tank like a Paladin and learn the class. D&D is already next to useless for the 3 rune cost and limited aggro.. you get WAY better aggro if you simply spread disease and blood boil.

To be honest, I can't think of a single time where I've used D&D other than as a farming/gathering tool.

@ScottyD

You fail. DnD is the hawt sauce for unholy, esp if you glyph for the 20% extra damage. Saying that it isn't a viable tanking tool, is well, stupid in the extreme.

The solution is to use rune tap to get an extra death rune when you need to do an initial pull. Like: DnD, it, ps, pest, rune tap, bb or do it in the opposite order if you like: it, ps, pest, bb, rune tap, dnd.

Removing damage from pestilence and putting it in bb is a good thing, esp for pvp when people kite you and you need a ranged nuke that returns RP so you can DC their face off.