Quote from Mackie264 >>

The mirror match-up just comes down to who has more cards and thus takes less fatigue, for that reason people are starting to run single copies of either Youthful Brewmaster or Baleful Banker and they became staples on Control Warrior. Unless your opponent heavily missplays or you get the absolute nuts of your Elysiana, it's almost impossible that you will win just via the discovered cards so the important part is just having the biggest pile of cards available. If the meta changes and Control Warrior becomes the unchallenged king (Either because of some nerfs or because they get some insane cards next expansion) you'll even start seeing multiple copies of Youthful Brewmaster or Baleful Banker or more important, the raise of Mecha'thun as a win condition on the mirror (which is more likely cause if you just keep playing Elysianas you'd just meet the turn cap and end most games on a draw)

 I have won control warrior mirrors with cards off Elysiana - you just have to plan ahead and pick accordingly. If you don't let your opponent stack a lot of armor, before you both reach the end of your normal decks, and then pick some high health threats (in my case, I've picked Boulderfist ogres and Omega devastator to remove his minions) and then went for his face and won. So, it's possible. But you need to switch from fully control to tempo tactic with the 5 Elysiana picks (ofc, RNG is a factor), but I knew I will lose the long game, cuz he used Baleful banker on his Elysiana and I didn't.

You just need to adapt.

I like her overall. She makes the control matchups even more interesting, because you have to plan ahead. You can't just rely on managing your resources correctly, you need to find a way to exert pressure on your opponent.