As I stated elsewhere, prior's problem is that the range of shots he uses so effectively in the Test Arena are precisely the type of shots that can be pretty well dried up (comparative to the rate of scoring required) in the shorter format of the game; now, that MIGHT change slightly now thatteh fielding restrictions are different, but I don't see that he will ever anchor an innings as well as Cook or Trott, destroy from early as effectively as KP or close an innings as well as Morgan or Buttler, ergo he is best prolonging his Test career.
As regards the selected squad, its kind of what you might expect - it might have been good for the selectors to make a definitive statement regarding Ravi, Bedwetter, Fat Sammy and the most Expensive Bowler in History but....well...even though only one of the three should even have an arguable England future for me, who is there that they could have profitably brought in to those slots? With the gloves? Foakes is a bit young, Davies tainted by the Surrey dressing room and Foster a bit old. Stokes might have taken Ravi's slot but... the same kind of applies to Fat Sammy - there isn't a similar player out there. Dernbach should have gone mind - even if the replacement was a left field one such as Shahzad, Roland-Jones or Moin Ashraf