The new HB glyph might be amazing. With the nerf to HB's bonus damage though I don't think it will be able to compete with Obliterates damage, even with a sub-par weapon. I have queued my character for the copy so I'm just waiting for it to go through. I won't have any final thoughts until I'm able to run the numbers but here is the build I'm looking at. Keep in mind that MMO's talent calculator isn't 100% accurate such as BotN still being a 5 point talent, it should only be 3.
The above build takes both Acclimation and Imp Frost Presence for max mitigation. We don't know what Ulduar will offer in terms of magic damage/fights yet but I prefer Acclimation and IFP over Icy Reach and Rime.
Rime loses it's splendor with the new HB rune and if with the new Pestilence glyph (Unsure if they're adding a new one that is major or just changing the minor Glyph) you can keep up both diseases with 1 blood rune, disease management will be a thing of the past.
Likewise if the minor Glyph is changing instead of needing a Major Glyph spot then there using Glyph of HB would be an easier decision to make. The more I think of it the less impressed I am lol but I was pretty stoked when I first saw it. Seems more like a gimick as time passes. Any way you look at it IT would only be used on the initial pull if at all and pestilence would do the rest of the work for the rest of the fight.
Glyph setup would look like this.
Howling Blast or Pestilence if it's a major.
IBF is useless now and has become a PvP Glyph lol.... so sad.
My mind is a jumbled mess right now, some of what I said may not make sense lol.