To be honest Serena second looks really great on her and i highly doubt they are going to change her look again. The way she look now is far more better then her first look which wasn't bad but needed to change.
This is what I agree with. While many do want to see various new appearances as she continues travelling with Ash I do feel her current look is something unique among female leads in that it's the most overdesigned of the bunch but it gives her a sense of individuality.