I might not have thought highly of Earth One but I do have to say is the technology designs are mostly really good. They still follow that Greco-Roman design while being interesting.
One thing I do question are the guns. I mean the small guns would be great has a test of reflexes and play bullets and bracelets. I do feel the bigger guns showed in Earth One would be better for soldiers guarding the doom gate.
One thig I think is the purple healing ray could have been made portable. It's the only thing that doesn't match the design of the other technlogy. But it's still cool to see.