Erza could get a rage and destroy Acnologia's ass in the next chapter and I wouldn't be even surprised.
Jokes aside, I enjoyed the scene when Acnologia beats Irene's corpse. She deserves it for being such a shitty villain. I don't feel any bit of pity for her. And Acnologia laughing while he beat the body was even more awesome.
I give August two chapters at best before Gildarts anhilates him. He just hit the button every villain hits before getting his/her ass kicked in this series; threatening anyone from the guild. And he even threats Gildarts's daughter, of all people.
Also, him smiling sadistically and telling Gildarts he is going to kill her daughter seems OOC for him considering he supposedly was a reasonable guy and he spared a lot of his opponents through the arc...
And, dammit, just let Cana be awesome for some moment, even Sting defeated an Spriggan, for God's sake.