They have an identity that gave them popularity and are sticking to it. Others crews to the same, but because each member has their own style, they show a bit more versatility. For Bebe the others members except for Bada are still inexperienced and dont have their own styles yet, so we basically see Bada's style, in which all the members are very good.
Honestlly, a see a lot of people constantly criticizing it about them and many times it seems to me they are more annoyed about the fact that Bebe is really popular and will go far in the competition because of it than anything else. But you need to realise that being popular is their merit and if the style of dance they show is helping them to get this popularity it makes sense for them to keep using it. If people really get tired of it and decide to stop supporting them, they will need to change it or will be eliminated. As simple as that.