grey, Hiro stated in an interview for Lucy, healing requires magic, Juvia wasn't really dead, just close to death, even knowing high enchants did not make her capable of winning even with help.
No, that is what you were saying about him not being wild is him being serious, him being serious is when he actually puts in the effort, are you telling me that a breath attack that destroyed an entire island while not serious is weaker than a simple physical strike? And Acno then was not even laughing, or nothing. where was it stated that being calm was required? Him stating that he hopes she'd be entertaining was before the fight started, and she did not disappoint for him so he responded in kind, and then he said she acknowledged her, I doubt a mere haha is the same as "DESTRUCTION! DESTRUCTION! DESTRUCTION!" with what he was doing with Igneel in a life or death battle, in fact that only proves my point by your method of thinking that him getting worked up means he is getting serious, especially after learning about Irene to pay more attention to a corse than actual dragons since she was the cause of his existence.