So, are you winning more games due to the death of a Warlord or to conquering enough dirt and having three matching planets?
In about 15 victories so far, I've won 2 with death of the opposing Warlord and 13 with dirt.
In about 9 defeats I've lost to dirt 8 times and had my Warlord killed once (it was Dark Eldar and AoEs really hurt my army of tokens.)
In my experience (I have 1 core set and my opponents each have 1 core set apiece) it is way too easy to have the opposing Warlord run away to make death a reliable victory condition. They can just retreat as their combat turn.
What do y'all say?