I think in reality england would have liked to pick Strauss, Pietersen and Bopara for this tour. But because of retirement, contract/team harmony and mental breakdown respectively they really have not many viable options left.
As flibber says it probably they just need a bit of experience. Morgan doesn't deserve it but he gets lucky because of the fate of Strauss, KP and Bops. Lets hope he shines although i sincerely doubt it.