I don't think there's anything wrong with sex appeal - I know a lot of men and women alike who enjoy dressing their characters in revealing attire. I do think some of that attire can be rather...tacky though.
A variety of options is ideal - and this goes for men, too. FFXV has Gladio who is basically a 'walking shirtless scene' so it's not exactly as if it's a new thing for the franchise.
