When players don't want to sign contracts that the club can afford there's not much to do no matter how many times someone says "just get it done". The club needs to look after itself, and the players need to look after themselves, and that won't always line up to having everyone locked down with 2-3 years left to run at all times. Trigger Wood's existing extension to take any pressure off and decide if Latibeaudiere is worth senior player wages (he's not). If Manning and Piroe think other clubs out there will pay them more to do the same job then that's a decision they're entitled to make, no one can make them sign anything to keep them here/get the club a bigger fee. Ntcham's probably on an inflated wage already, and Paterson got a pay rise just the other day.
I doubt many Championship clubs are reaching the end of the season without a similar list of concerns, either because loan players are leaving or their stars see futures elsewhere. Nature of the beast at this level.