Eliot should get a newer hairstyle (bowl cuts are out) like Jann lee's hair. That'd be nice.
It's not out of fashion in Japan. Eliot is supposed to be a "bishonen" (beautiful boy) and those usually have more feminine haircuts. (By the way, they had those haircuts looooong before Bieber was born). Spiky hair or really short hair doesn't fit to the bishonen archetype, so you will probably never see Eliot with that kind of hair. Those are for the more masculine guys.