I think the Warlord is in a good position to counter this kind of tactic with Conquer, if necessary. That could still be a way to potentially draw out Conquer(s) so that when the Epic anti-swarm conjurations are played, there isn't an easy answer.
I don't really think AoD particularly defines the Warlord. I think it's pretty good overall, even if it takes 1 or 2 more turns to activate than required, but if your opponent manages to hit Talos with a Banish when he comes out, you basically spent at least 9 mana plus actions to do nothing, which sucks.
With the current cardpool, I'd say AoD is only decent or mediocre. I read or heard somewhere (maybe on MWMondays) that new anti-teleport conjurations are in the works, so that'll be great news for big creatures everywhere. And new players who keep getting teleported into armies.