I'm not so sure you can discount all change Nicky S.
Is Carberry the future? You have to replace Bairstow with a proper keeper, and many media reports suggest Monty's action is very ragged at the moment - he certainly doesn't take many wickets, and we don't want a Paul Harris situation.
However, changing 2 or 3 personnel and having a coaching shake-up must have a galvansing effect.
It's all very well saying we were 13 tests unbeaten, but that was not a good team performance in the English summer and the signs were already beginning to show.
Also selection -with the performance squad out there, why the need for 3 gigantic quicks and no specialist reserve keeper in the main squad?