Superficially it can read as "Oh, wow, Roy has a pretty birdy of his own." But when you get to know the characters or if you know continuity, yeah, as you said, it's not a good mirror. But Meltzer's IDIOTIC manfacturing of hostility over Roy between Dinah and Kendra was SO freakin' out of character for both of Dinah and Kendra, and McDuffie rightly just ignored that when he took over the JLA book. Dinah and Kendra got along fine in the JSA book, in fact if anything Dinah was a nurturing older sister/surrogate mom friend to Kendra when she was having a very difficult time in the latter part of Johns' JSA, someone that consistently reached out to Kendra and befriended her (along with Courtney and Sand, of course), so I've never seen the two of them as being remotely catty with each other.

But then, that gets into male writers that can't conceive of anything other than a two speed overly simplistic relationship between two female characters, meaning that they're either being bitches to each other for 1) no discernible reason and/or 2) being bitchy to each other over a man.