You KNOW that he wants an Auctioneer turn 5-6, and that if you have ANY AoE mechanics, they have to be applied around that point, and Miracle doesn't have ANYTHING else you'd likely be saving AoE for. Half the classes in the game can AoE Auctioneer right off the board (technically Hunter uses Deadly Shot, it hits concealed minions just fine). Druid and Handlock will always be able to just Taunt wall, effectively removing the Leeroy kill condition from the game, negating most of what Auctioneer is really there for.
Sorry but no. Just had a game which ended 5 min ago where the rogue put down his Auctioneer on round 5, followed by preparation, eviscerate, backstab, preparation, shiv, thus allowing him to clear my side of the board and draw 6 cards.
I had Swipe, two Druids of the claw and one keeper of the grove in my hand, so I immediately swiped his Auctioneer to prevent him from drawing further, only leaving me with 2 mana to use my hero ability.
Next turn he put down 2 SI:7 Agents (doing me 4 damages), and I put down a wall with Druid of the Claw. But guess what he did ? Sap of course ! Wall goes back into my hand, and he then uses Deadly poison and I take 9 more damages.
Following turn I put down my wall again and hero ability and he Gets another Auctioneer out... he got rid of my wall again and from there it was over.
He won on round 9 despite me putting down 3 (4/6) walls, with a 10 cards advantage...
So no, at least as a druid, we can't hide behind a wall or use AOE to get out of it. The synergies between 0 mana rogues spells and Auctioneer is too much.