Really, the dev should forget about those ridiculous superhero costumes.
While the costumes ARE silly they are also FUN. Sure they aren't a BIG thing, but they make things a bit more fun. Silly isn't always bad. In this game the silly costume are fun play, which is so often lacking in other games.
Consider the 'Accidental' kiss, or the silly Bike scenes. They aren't MAJOR events, yet the BUILD the relationship. As they occur we can see that there is now and hopefully in the future will continue to be more than JUST sex. I actually LIKE the costumes and play as much as I enjoy the Swimsuits and workouts. Maybe as the game progresses the costumes will be set aside and some other fun will replace them, but for now I want them to stay and give us some teases and fun.
Just some thoughts.