Frost Strike, our rune power dump goes from 110% to 130% weapon damage.

No longer needing the (relatively) crappy DPS Blood Strike.
Able to go extra Obliterates on single targets or extra Howling Blasts on AoE, either way a huge gain.

And then Howling Blast hitting the initial target 20% harder.
And splash adjusted to not hit harder or softer.
But still an extra two HB's per ten seconds, thanks to the Blood Runes = Death Runes change.