I still think that Hales could do a fantastic job batting at 5, but don't like him at 2!
We need an opener at 2 - to me that means Stoneman/Hameed(once he gets some form back)/Gubbins, etc.
I think that Westley has shown enough technique quality to give him a run in there.
So assuming selectors eventually decide to give Jennings a rest for a "technique overhaul" then they will likely make the change in the next Test.
And wonder if they will continue on with Malan to give him a run or get Ballance back in at 5 if he is healed?