Yes but with uncapped players you don't know either. Let's say England stick with Jennings, which I think they are going to do and want Joe Denly on tour...,just for arguments, er sorry, discussions sake...
You might be left with a devastating attacking player who has the temperament for one day and t20 cricket, and an uncapped one who has 1000 FC runs for the last 5 seasons to choose from...
There won't be much medium pace even for the openers to face, spinners will be on real quick