I think Pryce will go next year.
There is no way we can accomodate 5 half back on a regular basis and develop our younger players. If that occurs they will simply walk. Gaskell and Wheeler could fight for centre, but that's no position to utilise their kicking game. Loose forward would be an option for say Wheeler, but Royce likes having a prop there. Not even Wilkin can get a game there.
It's healthy to have competition though and with everyone coming back, places are going to be hard to get hold of.
When fit, Wellens is probably pretty safe as our FB option.
Foster has to play given his form and his kicking
Shenton is a given.
Lomax is fairly easy choice
Then Graham, Roby, Perry, TP, Soliola and Wilkin (although wilkin not as safe as the rest).
With LMS CLough as replacement props.
That leaves everyone else chasing a centre , half back and wing spot and 2 bench spots. Ok Meli is a first choice for wing or centre at the moment, but I would not say he was a dead cert, like those above.