A few things regarding LoH:
-not every class has a 20 min cd ability
-Classes that do, that I can think of: Paladin, Warlock, Druid, Shaman
-two of those four(shammie, drood) are res abilities
-One of them is cool, but too underpowed to be useful (Warlock inferno)

Most of these abilities are really cool and Iconic in some way. As a Warrior, it's painful to see that hp bar that I worked so hard to drop suddenly refill. I still don't want to see it nerfed though. It isn't usable in arenas, and on a 20 min cooldown, it should be really cool.
The problem is that other classes don't have 20 min cooldowns. The res aspect of the druid and shaman classes' cooldowns is lost in bgs due to the autores setup, Inferno has always been awkward, but LoH has always had a purpose, and could be used in pvp because its only useful pre-death. This is the wrong way to do things. Blizz definitely wants to do cooler things with class abilities, just look at DK abilities. Nerfing paladins after so long is just a waste. We can deal with it.

For once instead of "taxing" everyone into the ground, bring everyone up to the same level.