I liked this chapter a lot.On one of Hiro's previous manga,there was a situation similar to this thing with the Wolfs.I wonder if the same thing that happened there is going to happen here too.It was pretty awesome there.
About Sting,I think the moment Sting stopped fighting for himself and also acknowledged his weakness he started using his head.That instead of being arrogant and thinking he's better than anyone out there.It's already being shown,when he saw that Natsu wasn't participating and didn't want to fight Kagura.He's on this tournament to win more than anything,so he's probably going to beat only people who are already beat up and stuff like that.