One reader's take...
To take this many issues just to get to something this "Been There/Done That", is borderline insulting. It might as well have been Cheetah instead of Wonder Woman. Not that I have any real problem with Cheetah being fleshed out. It's just like "The Lies" winds up being an afterthought.
As for Diana, exactly who is she as an adult? While she's not "Paper Thin", she's not that far off.
As for this issue, how does the entire thing not come to a screeching halt when Steve sees that Diana has a different mother? The rest of the issue is just tripping over it's own two feet.
I'm not saying this never amounts to anything. It's just way short of what the character actually deserves for a new "Rebirth" start/backstory.