This is the only Sunwell level healing weapon until Kil'jaeden. It also only has stats that are useful to all healing classes and is a 1h mace that can be used by all of them.

As such there's really no need to give preference to any particular class. Yes there's a staff with spirit off a Kil'jaeden, but if you're going to consider his loot, there's a 1h mace with no spirit off of him that's better than this too. So everyone has a better weapon if they wait till him.

But if you can kill KJ does it really matter anyways?