If Carberry is dropped after one poor performance it just shows that they've learnt nothing and nothing has changed. The Undroppables are still exactly that, of which Root has become one. Yes he did bat badly but he was still part on a opening partnership of 60 and has looked solid throughout the series. I think he's done ok considering all that has gone on around him; Cook repeatedly failing, Trott going home, Root not standing up as a no.3 and KP underperforming. I think even a well established player might have found all this a challenge. Sadly I would therefore expect this to be the end of his test career.