Outfits change all the time in comics. If it's made sensible, the vast majority of people would like it. Of course some people will complain/rage, because these are comic book fans. [tornado fang] 'em. The last time Diana changed her outfit, people argued over the fact that she had pants. It's ridiculous. If the comic itself is decent, if the character herself is decent, then her having her original outfit doesn't matter all that much.
It makes no sense because the concept of putting on a star-spangled one piece bikini with boots to alleviate fears of an outsider is silly. She already has Trevor, a pilot/soldier, to vouch for her. Like Superman, her heroic deeds would have put much of the fear aside. Especially considering she's an Ambassador of Peace. The only real reason to have her do something like that is because it's the outfit she was given originally by a kinky, misogynistic creep. That's all. It's a continuation of making up excuses to have her keep her original outfit to shy away from that fact.