I was never a fan of cash shops, nor was I ever a fan of characters not changing looks even if they put on new armor. I always saw it as a ploy to get players to buy their "special" clothes.
Take the game Lunia for example, for the longest while only about 4 or 5 of the characters out of the playable 9 at the time could acquire armor that changed their appearance. All of the characters that were created after them only got equipment that affected their stats, they always had the same look, always their default look.
For the longest time, thats the way it was and I wasn't very pleased about it. A few years later, the developers seemed to realize that this wasn't totally okay, and made all new armor for these characters that changed their looks that was not cash shop equipment.
I certainly hope that the developers for this game realize this too.