I think it's a quest of interaction with other mechanics.

Thinking as I'm writing... but we now have quite a bit that's target dependent. That item that's 20% extra damage and +1 target; Skywrath mage's ability; that level 1 demon that binds units together. So maybe there's a cunning Warrior strategy that revolves around tusk/doom/centaur? I can't see it being strong late game but who knows, someone more clever than me will probably make it work!