Oh yeah, wasn't this the show where they turned Wonder Woman into Judge Dredd plus the Punisher? Only, instead of being seen as a dangerous lawbreaker like the Punisher, or a necessary evil like Dredd, she was beloved by the public and nobody ever dared question her self-appointed judge, jury and executioner status.
Why should she wear some kind of a swimsuit? She's a heroine, strong and self-reliant and doesn't need to act as a sex symbol! Just think about! If she is in action, this pants protect her privat parts much better from beeing exposed than the classic costume. That make it also much more wearable for the actress btw.