Apologies if I didn't make myself clear. I sincerely believe that MAN is on the verge of becoming a major international hub, but you have to distinguish between the number of TA services, and whether the PAX on these are starting from MAN, or starting from the other side. The range of US destinations suggests that most PAX are going on holiday, but this could be transformed if one of the airline alliances decides to make MAN a hub.
Particularly for Premium PAX, so important to the viability of a route, inbound business is vital. I think that is why all 4 US services from EDI are continuing/R.