BHD may have lost their LGW, LTN and STN services over the years, but without doubt BHD is still the best airport for those wishing to fly to London. Both LHR and LCY are by far the two most convenient London airports - the other London airports are more hassle than they're worth. Aer Lingus, British Airways and Flybe also offer a much higher quality of service than easyJet and Ryanair.
Even when looking at domestic services in general, the high frequency of services from BHD makes it far more convenient than BFS. The only place where BHD falls behind is it's European offering, but at least BHD has links to two of the major alliances - BFS doesn't even have one alliance link.