I like Wonder Woman's design and Gal Godot was okay as the Amazonian in BvS. I think Aquaman looks good. I rather like the idea of Aquaman not being a blond-haired blue-eyed Caucasian. Batman is armored Batfleck. I guess it's okay.
Flash just looks flat-out terrible. Nothing there fits the concept of a speedster. Armored plates except the abdomen, weird bungee cord bits. I don't know what's going on there.
Cyborg just looks like the popular Bayformer jumble of junkyard parts and red lights, which is what I expected from Snyder and DC. I assumed that there was no way he was going to go for an understated armored suit look and would want all the spinning internal bits, lights, and a Terminator-ish look.
Really, the whole franchise suffers from a NetherRealm Injustice grimdark, armored, overdesigned look.