Probably has more to do with the owners Manchester airport group...!
We would be delighted to see more cargo flights at Manchester but that now seems to be the preserve of NEMA.
Likewise if a lo co approaches NEMA and in turn ManPlc they probably promote Manchester as a more cost effective option as has happened in the last 2years with the explosive growth of Loco Ex Manchester.
Initially the Man board were not interested in this traffic placing faith in BA, until they could see market share being eaten away rapidly, they and entered the market in an agggresive style
and have very cunningly creamed off considerable growth that may well have ended up at places like NEMA...
personnally I would rather see LH MD11s but you can'thave everything...!