Unnecessary Death Knight Buff

Just a quickie tonight.

While researching for Part 4 of my Death Knight Guide (which I swear I'm close to finishing), I happened upon a change in the upcoming Patch 3.0.8

Horn of Winter now has no cost and grants 10 runic power in addition to its stat buff, but has a 20 second cooldown.

What?

By removing the cost, Blizzard is guaranteeing that this buff will always be active, with absolutely no skill on the part of the Death Knight. Just click the button once every 2 minutes. At this point, they might as well just make it an Aura.

Also, I don't know how necessary the Runic Power gain is. Adding an extra click into your rotation just to gain 10 RP honestly doesn't seem like a good use of a GCD.

Horn of Winter does not stack with Strength of Earth, so if a Shaman is present, there's going to be a wasted buff somewhere, especially if it's talented. The only other worthwhile Earth Totem is Stoneskin, and 1k armor really isn't that much at current equipment levels.