Personally, I think that in these modern times people, directors, fans, actors and writers should stop worrying about how best to portray a female lead protagonist and just get on with it.
I look at films like Man of Steel and with the collateral damage I can't think of something so unlike Superman, but I accepted that it was a Superman film, enjoyed it and it made millions x100.
On the subject of Wonder Woman being a sex symbol, she's a woman, an Amazon who wears knickers, a corset, knee highs and bracelts. Like the comics, she hould be attractive: men are going to think sex and teenage boys are going to fap. And that should be the case.
Whether the film delves deep into feminity and the strength within it, breaking free of bondage, the glass ceiling women face at work or out right misogyny will be down to the story. None of these things I think should be avoided or deemed too taboo for film because they are subjects that Wonder Woman (and other female protagonists) have addresses in numerous other forms of text (comics, games, books, TV programs etc) and as a global society aren't we shouldn't shirk at these very real issues. Denial is a terrible thing.
Alternatively, the film could literally be a popcorn flick full of action and a butt kicking heroine wearing knickers, a corset, knee highs and bracelts. - Though I think that approach would be more damaging without a deeper social element to it.
But bottom line, for me, whatever the makers of the film go for they for. As long as the story is tight, dialog, acting and portrayal of the character is on point and doesn't betray the character as we understand her then I'd be happy watching it. The alternaitve is that nothing gets done as the uncomfortable issues are discussed and debated and we continue to go years without a female lead in a Superhero movie, which IMO is far more damaging.