I don't know about a "strategy" to push cargo to EMA and STN, which is I think what you are driving at.
Most of the additional tonnage through EMA appears to be on the DHL network, along with the other integrators that use EMA as a hub. When it comes to ad hoc additional movements, by the look of it they are going to non-MAG facilities such as DSA, LPL, BHX and the like. Because of the MAG business model at Manchester I really can't see them ever having wanted to attract DHL, UPS or Fedex/TNT to build a major hub their, such as exists at EMA and to a lesser extent, Stansted, as it could seriously impinge on capacity for the core business at Manchester - passenger traffic which will build back over time.