I think you will find that SNN supports 5 US destinations because of the considerable VFR traffic flows between Ireland and the US and a strong inbound flow of US tourists to Ireland. This is a niche long haul market in a similar way that BHX has AI to DEL/ATQ and T5 to ASB and onwards to ATQ.
We have to face facts that it will be MAN and not BHX getting the first regional UK airport scheduled service to China. An expanded series of charters next year from BHX may well happen. Worthy as that is, as far as China goes that is all BHX can expect for now. We also have to remember that there have, apart from AI (and the blink and you missed them flights by US Airways in 2011 and Air Blue last year), been no new scheduled or charter long haul routes or airlines at BHX for a very considerable number of years with nothing new on the horizon despite the millions of pounds poured into terminal expansion and runway extension.
Long haul scheduled airlines serving the UK primarily want to fly into LHR with MAN being next choice of airport for market growth. There is perhaps scope for an additional Middle East flight at BHX. However, I would far rather see BHX do a deal with EZY and work harder with its existing airlines to further develop and grow its short haul route structure.