IDK, the bits about her being sexually alluring without being a sex object are still accomplished with the current costume. if she walked around in it in the 1940s, she'd be showing pretty much the same amount of skin and would get pretty much the same reactions. She just accomplishes that while looking more practical for superheroing.
He also kind of lost me by saying Rucka ignored her personality in the movies. Her personality in her own movie was in line with Rucka's, Perez's and Marston's. And as for her personality in BvS, it's hard to judge because most of her screen time is fighting Doomsday, where action and weapons are just good sense because you can't love your way out a of a Doomsday scenario. Diana seeks peace, but she isn't an idiot.
The sword and shield need to be downplayed, but she carried them around pre-Flashpoint so it's not like the classic costume protected her from bad writers who wanted to make her violent. We can keep the costume and just...not have the sword. She wore this costume and didn't carry around the sword throughout all of Rucka's Rebirth run.
We need to go through periodic updates for these costumes for these characters, or else they stagnate. The fans of old or the rare fans with total old school appreciation/sensibilities can not sustain this business on their own. And this particular instance seems to have been successful, so it wouldn't make any sense whatsoever to go back to her old costume when there doesn't seem to be an outcry for it the way there is for Superman's trunks.