Before BA can think about intergrating another company, do they not still have the issue of 3,000 redundancies to sort out??? or has it just been dropped to be sorted another time and way???
Perhaps they do have some difficulties of their own to sort out. However BA or any financing organisation can see what potential value BD could bring. Consolidation of operations to LHR, expansion of the network, new markets, and the assets of BD itself are potentially worth a lot of money.
But of course they would be taking on a struggling airline with its own problems which, on the face of it, aren't too different to BA's own problems (pension deficit, lack of business pax, increasing costs etc). So although these would add to BA's 'debt', its a case of whether the assets and potential value of the BD purchase can balance that out, leaving the larger BA in a relatively better position than where they are now.
Of course time will tell. I'm sure it'll be a while before anything major happens...