double post
I liked this issue too. And really liked the art. First of all if Superman, Batman, and Wonder Woman were perfect in battle, that'd make for boring. And tha magic sword is a sound plot device to at least give Diana some excuse for slipping a little in the fight. Besides Pre-52 Slade was a loved combatant when he was teambusting all the the Teen Titans by himself.
Does this con mean Haephestus is evil?
The gods are neither good nor evil. They simply do what suits them at the time. Some are more generally benevolent than others, but in the end any one of them would do something that a decent person would consider bad without hesitation if it suits their needs.
"They can be a great people Kal-El, they wish to be. They only lack the light to show the way. For this reason above all, their capacity for good, I have sent them you. My only son." - Jor-El