I'd have picked Vince for the Ashes - as you say his getting in and nicking off for 20/30 for England is well known - but it's not as though we've a row of players looking like averaging 40+ in Test Cricket are lining up.James Vince although the decision to insert Surrey yesterday did not go well.
He has been a good captain at Hampshire. We know his problems in nicking off but Joe Root has developed the same fault.
But, as Mr Dozen says, there is no obvious candidate.
I hope free of the captaincy Root will score stacks of test match runs.