They all have a journey really, but just in their different ways.
I believe all the celebs have a journey in relation to their own ability, rather than a journey in relation to each other.
Even a good dancer can improve and if they have got better by the end from where they were frm the start, then they'e had a journey. Same with a rubbish dancer, if they improve from where they were at the start, then they've had a journey (it's all relative to their own ability and the pace and extent in which they can improve it from the start point to their exit.
No rubbish dancer will be able to push themseleves to the same extent as the better dancer will, but that doesn't mean the better dancer has had a lesser journey. A rubbish dancer will ush themseleves up to their limitations, and a better dancer (like Kara) will push themselves beyond their limitaitons, so they both are still woring hard and improvijgn, despte being at oposite ends of the ability spectrum.
Dave hasn't had a journey, imo, as I have yet to see what he's actully improved on. If Ben ever want to improve in Latin then he needs to become less square-hipped.