If you look at the pack Powell is assembling, a fair few of them are have played or are capable of playing front or back row.
Rodwell, McMeeken, Bain, Storton, Vagana have all played both at some point. Only Atoni and Uele look out and out props. Having said, I think McMeeken will have been signed with intention of playing prop, but he'll be equally good if we do need to drop him back at any point.